164171538 has 12 divisors (see below), whose sum is σ = 355705038. Its totient is φ = 54723840.

The previous prime is 164171537. The next prime is 164171543. The reversal of 164171538 is 835171461.

164171538 is a `hidden beast` number, since 1 + 641 + 7 + 1 + 5 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 147549609 + 16621929 = 12147^2 + 4077^2 .

It is not an unprimeable number, because it can be changed into a prime (164171531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4560303 + ... + 4560338.

Almost surely, 2^164171538 is an apocalyptic number.

164171538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164171538 is an abundant number, since it is smaller than the sum of its proper divisors (191533500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164171538 is a wasteful number, since it uses less digits than its factorization.

164171538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9120649 (or 9120646 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 164171538 is about 12812.9441581551. The cubic root of 164171538 is about 547.5611441064.

It can be divided in two parts, 16417 and 1538, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 164171538 in words is "one hundred sixty-four million, one hundred seventy-one thousand, five hundred thirty-eight".