157407996861 has 18 divisors (see below), whose sum is σ = 241528383642. Its totient is φ = 98765800320.

The previous prime is 157407996803. The next prime is 157407996887. The reversal of 157407996861 is 168699704751.

It can be written as a sum of positive squares in 3 ways, for example, as 36255968100 + 121152028761 = 190410^2 + 348069^2 .

It is not a de Polignac number, because 157407996861 - 2¹⁰ = 157407995837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157407996061) 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 17 ways as a sum of consecutive naturals, for example, 30256530 + ... + 30261731.

Almost surely, 2^157407996861 is an apocalyptic number.

It is an amenable number.

157407996861 is a deficient number, since it is larger than the sum of its proper divisors (84120386781).

157407996861 is a wasteful number, since it uses less digits than its factorization.

157407996861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60518301 (or 60518281 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 157407996861 in words is "one hundred fifty-seven billion, four hundred seven million, nine hundred ninety-six thousand, eight hundred sixty-one".