157688645 has 16 divisors (see below), whose sum is σ = 191572992. Its totient is φ = 124597440.

The previous prime is 157688633. The next prime is 157688653. The reversal of 157688645 is 546886751.

It is not a de Polignac number, because 157688645 - 2²⁶ = 90579781 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157688593 and 157688602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155159 + ... + 156171.

It is an arithmetic number, because the mean of its divisors is an integer number (11973312).

Almost surely, 2^157688645 is an apocalyptic number.

It is an amenable number.

157688645 is a deficient number, since it is larger than the sum of its proper divisors (33884347).

157688645 is a wasteful number, since it uses less digits than its factorization.

157688645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372.

The product of its digits is 1612800, while the sum is 50.

The square root of 157688645 is about 12557.4139455542. The cubic root of 157688645 is about 540.2566738170.

The spelling of 157688645 in words is "one hundred fifty-seven million, six hundred eighty-eight thousand, six hundred forty-five".