157007165721 has 16 divisors (see below), whose sum is σ = 240302982144. Its totient is φ = 89323142544.

The previous prime is 157007165641. The next prime is 157007165737. The reversal of 157007165721 is 127561700751.

It is not a de Polignac number, because 157007165721 - 2¹³ = 157007157529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157007169721) 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, 16463365 + ... + 16472898.

It is an arithmetic number, because the mean of its divisors is an integer number (15018936384).

Almost surely, 2^157007165721 is an apocalyptic number.

It is an amenable number.

157007165721 is a deficient number, since it is larger than the sum of its proper divisors (83295816423).

157007165721 is a wasteful number, since it uses less digits than its factorization.

157007165721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32936500.

The product of its (nonzero) digits is 102900, while the sum is 42.

The spelling of 157007165721 in words is "one hundred fifty-seven billion, seven million, one hundred sixty-five thousand, seven hundred twenty-one".