81152604 has 60 divisors (see below), whose sum is σ = 228479944. Its totient is φ = 24968736.

The previous prime is 81152587. The next prime is 81152623. The reversal of 81152604 is 40625118.

81152604 is a `hidden beast` number, since 8 + 1 + 1 + 52 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 5422 + ... + 13845.

Almost surely, 2^81152604 is an apocalyptic number.

It is an amenable number.

81152604 is an abundant number, since it is smaller than the sum of its proper divisors (147327340).

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

81152604 is a wasteful number, since it uses less digits than its factorization.

81152604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19296 (or 19285 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 81152604 is about 9008.4740106191. The cubic root of 81152604 is about 432.9464204496.

The spelling of 81152604 in words is "eighty-one million, one hundred fifty-two thousand, six hundred four".