81056704 has 14 divisors (see below), whose sum is σ = 160847024. Its totient is φ = 40528320.

The previous prime is 81056699. The next prime is 81056741. The reversal of 81056704 is 40765018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633192 + ... + 633319.

Almost surely, 2^81056704 is an apocalyptic number.

It is an amenable number.

81056704 is a deficient number, since it is larger than the sum of its proper divisors (79790320).

81056704 is a wasteful number, since it uses less digits than its factorization.

81056704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266523 (or 1266513 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 81056704 is about 9003.1496710873. The cubic root of 81056704 is about 432.7758121335.

The spelling of 81056704 in words is "eighty-one million, fifty-six thousand, seven hundred four".