80764865 has 8 divisors (see below), whose sum is σ = 97342440. Its totient is φ = 64328832.

The previous prime is 80764861. The next prime is 80764883. The reversal of 80764865 is 56846708.

It can be written as a sum of positive squares in 4 ways, for example, as 46799281 + 33965584 = 6841^2 + 5828^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 80764865 - 2² = 80764861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80764861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34124 + ... + 36413.

It is an arithmetic number, because the mean of its divisors is an integer number (12167805).

Almost surely, 2^80764865 is an apocalyptic number.

It is an amenable number.

80764865 is a deficient number, since it is larger than the sum of its proper divisors (16577575).

80764865 is a wasteful number, since it uses less digits than its factorization.

80764865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70771.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 80764865 is about 8986.9274504694. The cubic root of 80764865 is about 432.2557945118.

The spelling of 80764865 in words is "eighty million, seven hundred sixty-four thousand, eight hundred sixty-five".