81250976 has 12 divisors (see below), whose sum is σ = 159962922. Its totient is φ = 40625472.

The previous prime is 81250943. The next prime is 81250979. The reversal of 81250976 is 67905218.

It can be written as a sum of positive squares in only one way, i.e., 42562576 + 38688400 = 6524^2 + 6220^2 .

It is a super-2 number, since 2×81250976² = 13203442201905152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81250979) by changing a digit.

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 as a sum of consecutive naturals, namely, 1269515 + ... + 1269578.

Almost surely, 2^81250976 is an apocalyptic number.

It is an amenable number.

81250976 is a deficient number, since it is larger than the sum of its proper divisors (78711946).

81250976 is a wasteful number, since it uses less digits than its factorization.

81250976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539103 (or 2539095 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 81250976 is about 9013.9323272365. The cubic root of 81250976 is about 433.1212869186.

The spelling of 81250976 in words is "eighty-one million, two hundred fifty thousand, nine hundred seventy-six".