351657507772881 has 12 divisors (see below), whose sum is σ = 507949917088900. Its totient is φ = 234438253758720.

The previous prime is 351657507772843. The next prime is 351657507772897. The reversal of 351657507772881 is 188277705756153.

351657507772881 is a `hidden beast` number, since 3 + 5 + 16 + 5 + 7 + 507 + 7 + 7 + 28 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 255354295676481 + 96303212096400 = 15979809^2 + 9813420^2 .

It is not a de Polignac number, because 351657507772881 - 2¹⁴ = 351657507756497 is a prime.

It is a super-2 number, since 2×351657507772881² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (351657507779881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28796121 + ... + 39147561.

Almost surely, 2^{351657507772881} is an apocalyptic number.

It is an amenable number.

351657507772881 is a deficient number, since it is larger than the sum of its proper divisors (156292409316019).

351657507772881 is a wasteful number, since it uses less digits than its factorization.

351657507772881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14126096 (or 14126093 counting only the distinct ones).

The product of its (nonzero) digits is 691488000, while the sum is 72.

The spelling of 351657507772881 in words is "three hundred fifty-one trillion, six hundred fifty-seven billion, five hundred seven million, seven hundred seventy-two thousand, eight hundred eighty-one".