80977715 has 96 divisors (see below), whose sum is σ = 138257280. Its totient is φ = 44126208.

The previous prime is 80977711. The next prime is 80977717. The reversal of 80977715 is 51777908.

It is not a de Polignac number, because 80977715 - 2² = 80977711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80977711) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2792321 + ... + 2792349.

It is an arithmetic number, because the mean of its divisors is an integer number (1440180).

Almost surely, 2^80977715 is an apocalyptic number.

80977715 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

80977715 is a deficient number, since it is larger than the sum of its proper divisors (57279565).

80977715 is a wasteful number, since it uses less digits than its factorization.

80977715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 80977715 is about 8998.7618592782. The cubic root of 80977715 is about 432.6351877840.

The spelling of 80977715 in words is "eighty million, nine hundred seventy-seven thousand, seven hundred fifteen".