80964865 has 8 divisors (see below), whose sum is σ = 97720488. Its totient is φ = 64396800.

The previous prime is 80964827. The next prime is 80964883. The reversal of 80964865 is 56846908.

It can be written as a sum of positive squares in 4 ways, for example, as 47775744 + 33189121 = 6912^2 + 5761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-80964865 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45936 + ... + 47665.

It is an arithmetic number, because the mean of its divisors is an integer number (12215061).

Almost surely, 2^80964865 is an apocalyptic number.

It is an amenable number.

80964865 is a deficient number, since it is larger than the sum of its proper divisors (16755623).

80964865 is a wasteful number, since it uses less digits than its factorization.

80964865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93779.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 80964865 is about 8998.0478438381. The cubic root of 80964865 is about 432.6123022438.

The spelling of 80964865 in words is "eighty million, nine hundred sixty-four thousand, eight hundred sixty-five".