164155572 has 60 divisors (see below), whose sum is σ = 490446880. Its totient is φ = 46900944.

The previous prime is 164155567. The next prime is 164155591. The reversal of 164155572 is 275551461.

164155572 is a `hidden beast` number, since 1 + 641 + 5 + 5 + 5 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33922 + ... + 38457.

Almost surely, 2^164155572 is an apocalyptic number.

164155572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

164155572 is an abundant number, since it is smaller than the sum of its proper divisors (326291308).

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

164155572 is a wasteful number, since it uses less digits than its factorization.

164155572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72402 (or 72391 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 164155572 is about 12812.3211011901. The cubic root of 164155572 is about 547.5433930704.

The spelling of 164155572 in words is "one hundred sixty-four million, one hundred fifty-five thousand, five hundred seventy-two".