80927179921 has 16 divisors (see below), whose sum is σ = 100496527360. Its totient is φ = 63595452240.

The previous prime is 80927179901. The next prime is 80927179961. The reversal of 80927179921 is 12997172908.

It is a cyclic number.

It is not a de Polignac number, because 80927179921 - 2⁵ = 80927179889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80927179901) 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 15 ways as a sum of consecutive naturals, for example, 9809991 + ... + 9818236.

It is an arithmetic number, because the mean of its divisors is an integer number (6281032960).

Almost surely, 2^80927179921 is an apocalyptic number.

It is an amenable number.

80927179921 is a deficient number, since it is larger than the sum of its proper divisors (19569347439).

80927179921 is a wasteful number, since it uses less digits than its factorization.

80927179921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19628284.

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 80927179921 in words is "eighty billion, nine hundred twenty-seven million, one hundred seventy-nine thousand, nine hundred twenty-one".