157638171 has 16 divisors (see below), whose sum is σ = 220419360. Its totient is φ = 100074240.

The previous prime is 157638163. The next prime is 157638179. The reversal of 157638171 is 171836751.

It is an interprime number because it is at equal distance from previous prime (157638163) and next prime (157638179).

It is not a de Polignac number, because 157638171 - 2³ = 157638163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157638179) 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, 6060 + ... + 18761.

It is an arithmetic number, because the mean of its divisors is an integer number (13776210).

Almost surely, 2^157638171 is an apocalyptic number.

157638171 is a deficient number, since it is larger than the sum of its proper divisors (62781189).

157638171 is a wasteful number, since it uses less digits than its factorization.

157638171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24926.

The product of its digits is 35280, while the sum is 39.

The square root of 157638171 is about 12555.4040556248. The cubic root of 157638171 is about 540.1990247171.

It can be divided in two parts, 15 and 7638171, that added together give a triangular number (7638186 = T₃₉₀₈).

The spelling of 157638171 in words is "one hundred fifty-seven million, six hundred thirty-eight thousand, one hundred seventy-one".