80776692 has 18 divisors (see below), whose sum is σ = 204185618. Its totient is φ = 26925552.

The previous prime is 80776643. The next prime is 80776721. The reversal of 80776692 is 29667708.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 75272976 + 5503716 = 8676^2 + 2346^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1121863 + ... + 1121934.

Almost surely, 2^80776692 is an apocalyptic number.

It is an amenable number.

80776692 is an abundant number, since it is smaller than the sum of its proper divisors (123408926).

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

80776692 is a wasteful number, since it uses less digits than its factorization.

80776692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243807 (or 2243802 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 80776692 is about 8987.5854377024. The cubic root of 80776692 is about 432.2768929592.

The spelling of 80776692 in words is "eighty million, seven hundred seventy-six thousand, six hundred ninety-two".