80776919 has 16 divisors (see below), whose sum is σ = 86190720. Its totient is φ = 75569760.

The previous prime is 80776907. The next prime is 80776921. The reversal of 80776919 is 91967708.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80776919 is a prime.

It is a super-2 number, since 2×80776919² = 13049821286265122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80776939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262964 + ... + 263270.

It is an arithmetic number, because the mean of its divisors is an integer number (5386920).

Almost surely, 2^80776919 is an apocalyptic number.

80776919 is a deficient number, since it is larger than the sum of its proper divisors (5413801).

80776919 is a wasteful number, since it uses less digits than its factorization.

80776919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 80776919 is about 8987.5980662244. The cubic root of 80776919 is about 432.2772978893.

The spelling of 80776919 in words is "eighty million, seven hundred seventy-six thousand, nine hundred nineteen".