80781764 has 12 divisors (see below), whose sum is σ = 161563584. Its totient is φ = 34620744.

The previous prime is 80781763. The next prime is 80781769. The reversal of 80781764 is 46718708.

80781764 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (80781763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442504 + ... + 1442559.

It is an arithmetic number, because the mean of its divisors is an integer number (13463632).

Almost surely, 2^80781764 is an apocalyptic number.

It is an amenable number.

80781764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

80781764 is a wasteful number, since it uses less digits than its factorization.

80781764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885074 (or 2885072 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 80781764 is about 8987.8676002709. The cubic root of 80781764 is about 432.2859403814.

The spelling of 80781764 in words is "eighty million, seven hundred eighty-one thousand, seven hundred sixty-four".