81150752 has 24 divisors (see below), whose sum is σ = 160141212. Its totient is φ = 40480000.

The previous prime is 81150749. The next prime is 81150763. The reversal of 81150752 is 25705118.

It can be written as a sum of positive squares in 2 ways, for example, as 76807696 + 4343056 = 8764^2 + 2084^2 .

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, 12002 + ... + 17502.

Almost surely, 2^81150752 is an apocalyptic number.

It is an amenable number.

81150752 is a deficient number, since it is larger than the sum of its proper divisors (78990460).

81150752 is a wasteful number, since it uses less digits than its factorization.

81150752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5972 (or 5964 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 81150752 is about 9008.3712179284. The cubic root of 81150752 is about 432.9431269719.

The spelling of 81150752 in words is "eighty-one million, one hundred fifty thousand, seven hundred fifty-two".