80015865 has 16 divisors (see below), whose sum is σ = 129161088. Its totient is φ = 42296576.

The previous prime is 80015833. The next prime is 80015893. The reversal of 80015865 is 56851008.

It is a cyclic number.

It is not a de Polignac number, because 80015865 - 2⁵ = 80015833 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 21909 + ... + 25298.

It is an arithmetic number, because the mean of its divisors is an integer number (8072568).

Almost surely, 2^80015865 is an apocalyptic number.

It is an amenable number.

80015865 is a deficient number, since it is larger than the sum of its proper divisors (49145223).

80015865 is a wasteful number, since it uses less digits than its factorization.

80015865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47328.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 80015865 is about 8945.1587464952. The cubic root of 80015865 is about 430.9154195457.

The spelling of 80015865 in words is "eighty million, fifteen thousand, eight hundred sixty-five".