80139168 has 36 divisors (see below), whose sum is σ = 227896578. Its totient is φ = 26712960.

The previous prime is 80139149. The next prime is 80139179. The reversal of 80139168 is 86193108.

It can be written as a sum of positive squares in only one way, i.e., 66389904 + 13749264 = 8148^2 + 3708^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

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, 138843 + ... + 139418.

Almost surely, 2^80139168 is an apocalyptic number.

It is an amenable number.

80139168 is an abundant number, since it is smaller than the sum of its proper divisors (147757410).

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

80139168 is a wasteful number, since it uses less digits than its factorization.

80139168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278277 (or 278266 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 80139168 is about 8952.0482572426. The cubic root of 80139168 is about 431.1366502350.

The spelling of 80139168 in words is "eighty million, one hundred thirty-nine thousand, one hundred sixty-eight".