80654494991 has 16 divisors (see below), whose sum is σ = 92300382720. Its totient is φ = 69039643680.

The previous prime is 80654494981. The next prime is 80654495059. The reversal of 80654494991 is 19949445608.

It is not a de Polignac number, because 80654494991 - 2²⁶ = 80587386127 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 80654494991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80654494981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30468830 + ... + 30471476.

It is an arithmetic number, because the mean of its divisors is an integer number (5768773920).

Almost surely, 2^80654494991 is an apocalyptic number.

80654494991 is a deficient number, since it is larger than the sum of its proper divisors (11645887729).

80654494991 is a wasteful number, since it uses less digits than its factorization.

80654494991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 80654494991 in words is "eighty billion, six hundred fifty-four million, four hundred ninety-four thousand, nine hundred ninety-one".