157638165 has 32 divisors (see below), whose sum is σ = 260184960. Its totient is φ = 81459456.

The previous prime is 157638163. The next prime is 157638179. The reversal of 157638165 is 561836751.

157638165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 157638165 - 2¹ = 157638163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157638163) 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, 64791 + ... + 67179.

It is an arithmetic number, because the mean of its divisors is an integer number (8130780).

Almost surely, 2^157638165 is an apocalyptic number.

157638165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157638165 is a deficient number, since it is larger than the sum of its proper divisors (102546795).

157638165 is a wasteful number, since it uses less digits than its factorization.

157638165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533.

The product of its digits is 151200, while the sum is 42.

The square root of 157638165 is about 12555.4038166839. The cubic root of 157638165 is about 540.1990178635.

The spelling of 157638165 in words is "one hundred fifty-seven million, six hundred thirty-eight thousand, one hundred sixty-five".