81052604 has 12 divisors (see below), whose sum is σ = 142181928. Its totient is φ = 40429200.

The previous prime is 81052589. The next prime is 81052619. The reversal of 81052604 is 40625018.

It is an interprime number because it is at equal distance from previous prime (81052589) and next prime (81052619).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22382 + ... + 25749.

It is an arithmetic number, because the mean of its divisors is an integer number (11848494).

Almost surely, 2^81052604 is an apocalyptic number.

It is an amenable number.

81052604 is a deficient number, since it is larger than the sum of its proper divisors (61129324).

81052604 is a wasteful number, since it uses less digits than its factorization.

81052604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48556 (or 48554 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 81052604 is about 9002.9219701161. The cubic root of 81052604 is about 432.7685151399.

The spelling of 81052604 in words is "eighty-one million, fifty-two thousand, six hundred four".