164685604 has 12 divisors (see below), whose sum is σ = 292924828. Its totient is φ = 80992800.

The previous prime is 164685601. The next prime is 164685611. The reversal of 164685604 is 406586461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 91240704 + 73444900 = 9552^2 + 8570^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (164685601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337227 + ... + 337714.

Almost surely, 2^164685604 is an apocalyptic number.

It is an amenable number.

164685604 is a deficient number, since it is larger than the sum of its proper divisors (128239224).

164685604 is a wasteful number, since it uses less digits than its factorization.

164685604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675006 (or 675004 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 164685604 is about 12832.9888958107. The cubic root of 164685604 is about 548.1320698607.

The spelling of 164685604 in words is "one hundred sixty-four million, six hundred eighty-five thousand, six hundred four".