80777800555 has 16 divisors (see below), whose sum is σ = 101196345600. Its totient is φ = 61782944608.

The previous prime is 80777800507. The next prime is 80777800561. The reversal of 80777800555 is 55500877708.

It is a cyclic number.

It is not a de Polignac number, because 80777800555 - 2⁷ = 80777800427 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74064 + ... + 408706.

It is an arithmetic number, because the mean of its divisors is an integer number (6324771600).

Almost surely, 2^80777800555 is an apocalyptic number.

80777800555 is a deficient number, since it is larger than the sum of its proper divisors (20418545045).

80777800555 is a wasteful number, since it uses less digits than its factorization.

80777800555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336770.

The product of its (nonzero) digits is 2744000, while the sum is 52.

The spelling of 80777800555 in words is "eighty billion, seven hundred seventy-seven million, eight hundred thousand, five hundred fifty-five".