164555864 has 16 divisors (see below), whose sum is σ = 336591720. Its totient is φ = 74798080.

The previous prime is 164555861. The next prime is 164555887. The reversal of 164555864 is 468555461.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164555861) 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, 934889 + ... + 935064.

Almost surely, 2^164555864 is an apocalyptic number.

It is an amenable number.

164555864 is an abundant number, since it is smaller than the sum of its proper divisors (172035856).

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

164555864 is a wasteful number, since it uses less digits than its factorization.

164555864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869970 (or 1869966 counting only the distinct ones).

The product of its digits is 576000, while the sum is 44.

The square root of 164555864 is about 12827.9329589767. The cubic root of 164555864 is about 547.9880918079.

The spelling of 164555864 in words is "one hundred sixty-four million, five hundred fifty-five thousand, eight hundred sixty-four".