80689868655 has 32 divisors (see below), whose sum is σ = 140961109248. Its totient is φ = 39088857600.

The previous prime is 80689868621. The next prime is 80689868681. The reversal of 80689868655 is 55686898608.

It is not a de Polignac number, because 80689868655 - 2⁹ = 80689868143 is a prime.

It is a super-2 number, since 2×80689868655² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80689868655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15594 + ... + 402023.

It is an arithmetic number, because the mean of its divisors is an integer number (4405034664).

Almost surely, 2^80689868655 is an apocalyptic number.

80689868655 is a deficient number, since it is larger than the sum of its proper divisors (60271240593).

80689868655 is a wasteful number, since it uses less digits than its factorization.

80689868655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418807.

The product of its (nonzero) digits is 199065600, while the sum is 69.

The spelling of 80689868655 in words is "eighty billion, six hundred eighty-nine million, eight hundred sixty-eight thousand, six hundred fifty-five".