1251044552541 has 64 divisors (see below), whose sum is σ = 2015047802880. Its totient is φ = 675210816000.

The previous prime is 1251044552539. The next prime is 1251044552543. The reversal of 1251044552541 is 1452554401521.

It is an interprime number because it is at equal distance from previous prime (1251044552539) and next prime (1251044552543).

It is not a de Polignac number, because 1251044552541 - 2¹ = 1251044552539 is a prime.

It is a super-2 number, since 2×1251044552541² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1251044552541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251044552543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64420665 + ... + 64440081.

It is an arithmetic number, because the mean of its divisors is an integer number (31485121920).

Almost surely, 2^{1251044552541} is an apocalyptic number.

It is an amenable number.

1251044552541 is a deficient number, since it is larger than the sum of its proper divisors (764003250339).

1251044552541 is a wasteful number, since it uses less digits than its factorization.

1251044552541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21754.

The product of its (nonzero) digits is 160000, while the sum is 39.

The spelling of 1251044552541 in words is "one trillion, two hundred fifty-one billion, forty-four million, five hundred fifty-two thousand, five hundred forty-one".