80889644691 has 6 divisors (see below), whose sum is σ = 116840597900. Its totient is φ = 53926429788.

The previous prime is 80889644677. The next prime is 80889644729. The reversal of 80889644691 is 19644698808.

80889644691 is a `hidden beast` number, since 8 + 0 + 88 + 96 + 4 + 469 + 1 = 666.

It is not a de Polignac number, because 80889644691 - 2¹⁴ = 80889628307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80889644611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4493869141 + ... + 4493869158.

Almost surely, 2^80889644691 is an apocalyptic number.

80889644691 is a deficient number, since it is larger than the sum of its proper divisors (35950953209).

80889644691 is a wasteful number, since it uses less digits than its factorization.

80889644691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8987738305 (or 8987738302 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 80889644691 in words is "eighty billion, eight hundred eighty-nine million, six hundred forty-four thousand, six hundred ninety-one".