80778464 has 24 divisors (see below), whose sum is σ = 171266760. Its totient is φ = 37282176.

The previous prime is 80778449. The next prime is 80778479. The reversal of 80778464 is 46487708.

It is an interprime number because it is at equal distance from previous prime (80778449) and next prime (80778479).

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, 96674 + ... + 97505.

It is an arithmetic number, because the mean of its divisors is an integer number (7136115).

Almost surely, 2^80778464 is an apocalyptic number.

It is an amenable number.

80778464 is an abundant number, since it is smaller than the sum of its proper divisors (90488296).

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

80778464 is a wasteful number, since it uses less digits than its factorization.

80778464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194202 (or 194194 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 80778464 is about 8987.6840175876. The cubic root of 80778464 is about 432.2800538918.

Subtracting from 80778464 its product of nonzero digits (301056), we obtain a palindrome (80477408).

The spelling of 80778464 in words is "eighty million, seven hundred seventy-eight thousand, four hundred sixty-four".