72620164 has 6 divisors (see below), whose sum is σ = 127085294. Its totient is φ = 36310080.

The previous prime is 72620113. The next prime is 72620179. The reversal of 72620164 is 46102627.

It can be written as a sum of positive squares in only one way, i.e., 48413764 + 24206400 = 6958^2 + 4920^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9077517 + ... + 9077524.

Almost surely, 2^72620164 is an apocalyptic number.

It is an amenable number.

72620164 is a deficient number, since it is larger than the sum of its proper divisors (54465130).

72620164 is a wasteful number, since it uses less digits than its factorization.

72620164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18155045 (or 18155043 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 72620164 is about 8521.7465346019. The cubic root of 72620164 is about 417.2077895999.

The spelling of 72620164 in words is "seventy-two million, six hundred twenty thousand, one hundred sixty-four".