80681256 has 24 divisors (see below), whose sum is σ = 218511930. Its totient is φ = 26893728.

The previous prime is 80681243. The next prime is 80681267. The reversal of 80681256 is 65218608.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 79816356 + 864900 = 8934^2 + 930^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 80681256.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 560215 + ... + 560358.

Almost surely, 2^80681256 is an apocalyptic number.

It is an amenable number.

80681256 is an abundant number, since it is smaller than the sum of its proper divisors (137830674).

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

80681256 is a wasteful number, since it uses less digits than its factorization.

80681256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120585 (or 1120578 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 80681256 is about 8982.2745449023. The cubic root of 80681256 is about 432.1065837836.

The spelling of 80681256 in words is "eighty million, six hundred eighty-one thousand, two hundred fifty-six".