157987170321 has 32 divisors (see below), whose sum is σ = 214118400000. Its totient is φ = 103601272320.

The previous prime is 157987170293. The next prime is 157987170331. The reversal of 157987170321 is 123071789751.

It is not a de Polignac number, because 157987170321 - 2⁷ = 157987170193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157987170331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126490305 + ... + 126491553.

It is an arithmetic number, because the mean of its divisors is an integer number (6691200000).

Almost surely, 2^157987170321 is an apocalyptic number.

It is an amenable number.

157987170321 is a deficient number, since it is larger than the sum of its proper divisors (56131229679).

157987170321 is a wasteful number, since it uses less digits than its factorization.

157987170321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909.

The product of its (nonzero) digits is 740880, while the sum is 51.

The spelling of 157987170321 in words is "one hundred fifty-seven billion, nine hundred eighty-seven million, one hundred seventy thousand, three hundred twenty-one".