80929489979 has 64 divisors (see below), whose sum is σ = 96268677120. Its totient is φ = 67366080000.

The previous prime is 80929489931. The next prime is 80929489999. The reversal of 80929489979 is 97998492908.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80929489979 is a prime.

It is a super-2 number, since 2×80929489979² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80929489999) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 175551809 + ... + 175552269.

It is an arithmetic number, because the mean of its divisors is an integer number (1504198080).

Almost surely, 2^80929489979 is an apocalyptic number.

80929489979 is a deficient number, since it is larger than the sum of its proper divisors (15339187141).

80929489979 is a wasteful number, since it uses less digits than its factorization.

80929489979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852.

The product of its (nonzero) digits is 211631616, while the sum is 74.

The spelling of 80929489979 in words is "eighty billion, nine hundred twenty-nine million, four hundred eighty-nine thousand, nine hundred seventy-nine".