80651856 has 20 divisors (see below), whose sum is σ = 208350752. Its totient is φ = 26883936.

The previous prime is 80651819. The next prime is 80651867. The reversal of 80651856 is 65815608.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 840076 + ... + 840171.

Almost surely, 2^80651856 is an apocalyptic number.

It is an amenable number.

80651856 is an abundant number, since it is smaller than the sum of its proper divisors (127698896).

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

80651856 is a wasteful number, since it uses less digits than its factorization.

80651856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680258 (or 1680252 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 80651856 is about 8980.6378392629. The cubic root of 80651856 is about 432.0540913064.

The spelling of 80651856 in words is "eighty million, six hundred fifty-one thousand, eight hundred fifty-six".