164536731 has 16 divisors (see below), whose sum is σ = 249705120. Its totient is φ = 107015040.

The previous prime is 164536717. The next prime is 164536739. The reversal of 164536731 is 137635461.

164536731 is a `hidden beast` number, since 1 + 645 + 3 + 6 + 7 + 3 + 1 = 666.

It is not a de Polignac number, because 164536731 - 2¹⁴ = 164520347 is a prime.

It is a super-2 number, since 2×164536731² = 54144671696332722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164536739) 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, 73210 + ... + 75423.

It is an arithmetic number, because the mean of its divisors is an integer number (15606570).

Almost surely, 2^164536731 is an apocalyptic number.

164536731 is a deficient number, since it is larger than the sum of its proper divisors (85168389).

164536731 is a wasteful number, since it uses less digits than its factorization.

164536731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148683 (or 148677 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 164536731 is about 12827.1871819195. The cubic root of 164536731 is about 547.9668526934.

The spelling of 164536731 in words is "one hundred sixty-four million, five hundred thirty-six thousand, seven hundred thirty-one".