164921636 has 12 divisors (see below), whose sum is σ = 314850480. Its totient is φ = 74964360.

The previous prime is 164921633. The next prime is 164921651. The reversal of 164921636 is 636129461.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 164921636.

It is not an unprimeable number, because it can be changed into a prime (164921633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874066 + ... + 1874153.

It is an arithmetic number, because the mean of its divisors is an integer number (26237540).

Almost surely, 2^164921636 is an apocalyptic number.

It is an amenable number.

164921636 is a deficient number, since it is larger than the sum of its proper divisors (149928844).

164921636 is a wasteful number, since it uses less digits than its factorization.

164921636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748234 (or 3748232 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 164921636 is about 12842.1819018421. The cubic root of 164921636 is about 548.3938109114.

The spelling of 164921636 in words is "one hundred sixty-four million, nine hundred twenty-one thousand, six hundred thirty-six".