157740765810917 has 16 divisors (see below), whose sum is σ = 158295597505200. Its totient is φ = 157186992752640.

The previous prime is 157740765810907. The next prime is 157740765810923. The reversal of 157740765810917 is 719018567047751.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4849865422081 + 152890900388836 = 2202241^2 + 12364906^2 .

It is a cyclic number.

It is not a de Polignac number, because 157740765810917 - 2²⁴ = 157740749033701 is a prime.

It is a super-2 number, since 2×157740765810917² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157740765810907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726368809 + ... + 1726460177.

It is an arithmetic number, because the mean of its divisors is an integer number (9893474844075).

Almost surely, 2^{157740765810917} is an apocalyptic number.

It is an amenable number.

157740765810917 is a deficient number, since it is larger than the sum of its proper divisors (554831694283).

157740765810917 is an equidigital number, since it uses as much as digits as its factorization.

157740765810917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97096.

The product of its (nonzero) digits is 103723200, while the sum is 68.

The spelling of 157740765810917 in words is "one hundred fifty-seven trillion, seven hundred forty billion, seven hundred sixty-five million, eight hundred ten thousand, nine hundred seventeen".