999651291007141 has 4 divisors (see below), whose sum is σ = 999651358077484. Its totient is φ = 999651223936800.

The previous prime is 999651291007099. The next prime is 999651291007153. The reversal of 999651291007141 is 141700192156999.

999651291007141 is a nontrivial binomial coefficient, being equal to C(44713562, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 965523250036900 + 34128040970241 = 31072870^2 + 5841921^2 .

It is a 3-Lehmer number, since φ(999651291007141) divides (999651291007141-1)³.

It is a cyclic number.

It is not a de Polignac number, because 999651291007141 - 2¹¹ = 999651291005093 is a prime.

It is a super-2 number, since 2×999651291007141² (a number of 31 digits) contains 22 as substring.

It is a deceptive number, since it divides R_{999651291007140}.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999651291007841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 44713561.

It is an arithmetic number, because the mean of its divisors is an integer number (249912839519371).

It is a Poulet number, since it divides 2^{999651291007140}-1.

Almost surely, 2^{999651291007141} is an apocalyptic number.

999651291007141 is the 44713561-st triangular number and also the 22356781-st hexagonal number.

999651291007141 is the 14904521-st centered nonagonal number.

It is an amenable number.

999651291007141 is a deficient number, since it is larger than the sum of its proper divisors (67070343).

999651291007141 is a wasteful number, since it uses less digits than its factorization.

999651291007141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67070342.

The product of its (nonzero) digits is 11022480, while the sum is 64.

The spelling of 999651291007141 in words is "nine hundred ninety-nine trillion, six hundred fifty-one billion, two hundred ninety-one million, seven thousand, one hundred forty-one".