79305179681 has 32 divisors (see below), whose sum is σ = 98980240128. Its totient is φ = 61869899520.

The previous prime is 79305179677. The next prime is 79305179729. The reversal of 79305179681 is 18697150397.

It is not a de Polignac number, because 79305179681 - 2² = 79305179677 is a prime.

It is a super-2 number, since 2×79305179681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79305179581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1850411 + ... + 1892783.

It is an arithmetic number, because the mean of its divisors is an integer number (3093132504).

Almost surely, 2^79305179681 is an apocalyptic number.

It is an amenable number.

79305179681 is a deficient number, since it is larger than the sum of its proper divisors (19675060447).

79305179681 is a wasteful number, since it uses less digits than its factorization.

79305179681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42681.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 79305179681 in words is "seventy-nine billion, three hundred five million, one hundred seventy-nine thousand, six hundred eighty-one".