80807656277 has 2 divisors, whose sum is σ = 80807656278. Its totient is φ = 80807656276.

The previous prime is 80807656249. The next prime is 80807656283. The reversal of 80807656277 is 77265670808.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49535624356 + 31272031921 = 222566^2 + 176839^2 .

It is a cyclic number.

It is not a de Polignac number, because 80807656277 - 2⁸ = 80807656021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80807656777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40403828138 + 40403828139.

It is an arithmetic number, because the mean of its divisors is an integer number (40403828139).

Almost surely, 2^80807656277 is an apocalyptic number.

It is an amenable number.

80807656277 is a deficient number, since it is larger than the sum of its proper divisors (1).

80807656277 is an equidigital number, since it uses as much as digits as its factorization.

80807656277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 80807656277 in words is "eighty billion, eight hundred seven million, six hundred fifty-six thousand, two hundred seventy-seven".