999349265655791 has 4 divisors (see below), whose sum is σ = 1002132968346000. Its totient is φ = 996565562965584.

The previous prime is 999349265655779. The next prime is 999349265655823. The reversal of 999349265655791 is 197556562943999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999349265655791 is a prime.

It is a super-3 number, since 3×999349265655791³ (a number of 46 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999349265655697 and 999349265655706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999349265655731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391851344566 + ... + 1391851345283.

It is an arithmetic number, because the mean of its divisors is an integer number (250533242086500).

Almost surely, 2^{999349265655791} is an apocalyptic number.

999349265655791 is a deficient number, since it is larger than the sum of its proper divisors (2783702690209).

999349265655791 is a wasteful number, since it uses less digits than its factorization.

999349265655791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783702690208.

The product of its digits is 44641044000, while the sum is 89.

The spelling of 999349265655791 in words is "nine hundred ninety-nine trillion, three hundred forty-nine billion, two hundred sixty-five million, six hundred fifty-five thousand, seven hundred ninety-one".