80009878655 has 128 divisors (see below), whose sum is σ = 122092185600. Its totient is φ = 49119436800.

The previous prime is 80009878643. The next prime is 80009878727. The reversal of 80009878655 is 55687890008.

It is not a de Polignac number, because 80009878655 - 2⁶ = 80009878591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80009878655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 121410716 + ... + 121411374.

It is an arithmetic number, because the mean of its divisors is an integer number (953845200).

Almost surely, 2^80009878655 is an apocalyptic number.

80009878655 is a deficient number, since it is larger than the sum of its proper divisors (42082306945).

80009878655 is a wasteful number, since it uses less digits than its factorization.

80009878655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865.

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 80009878655 in words is "eighty billion, nine million, eight hundred seventy-eight thousand, six hundred fifty-five".