164906639 has 12 divisors (see below), whose sum is σ = 172186200. Its totient is φ = 157914000.

The previous prime is 164906627. The next prime is 164906653. The reversal of 164906639 is 936609461.

164906639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-164906639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164906639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164906689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96212 + ... + 97910.

It is an arithmetic number, because the mean of its divisors is an integer number (14348850).

Almost surely, 2^164906639 is an apocalyptic number.

164906639 is a deficient number, since it is larger than the sum of its proper divisors (7279561).

164906639 is a wasteful number, since it uses less digits than its factorization.

164906639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 164906639 is about 12841.5979924618. The cubic root of 164906639 is about 548.3771878423.

The spelling of 164906639 in words is "one hundred sixty-four million, nine hundred six thousand, six hundred thirty-nine".