80736865 has 16 divisors (see below), whose sum is σ = 109103616. Its totient is φ = 56822400.

The previous prime is 80736847. The next prime is 80736881. The reversal of 80736865 is 56863708.

It is not a de Polignac number, because 80736865 - 2⁷ = 80736737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21972 + ... + 25381.

It is an arithmetic number, because the mean of its divisors is an integer number (6818976).

Almost surely, 2^80736865 is an apocalyptic number.

It is an amenable number.

80736865 is a deficient number, since it is larger than the sum of its proper divisors (28366751).

80736865 is a wasteful number, since it uses less digits than its factorization.

80736865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47400.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 80736865 is about 8985.3694971325. The cubic root of 80736865 is about 432.2058364796.

The spelling of 80736865 in words is "eighty million, seven hundred thirty-six thousand, eight hundred sixty-five".