30979168081 has 27 divisors (see below), whose sum is σ = 32783016987. Its totient is φ = 29273816880.

The previous prime is 30979168049. The next prime is 30979168097. The reversal of 30979168081 is 18086197903.

It is a happy number.

The square root of 30979168081 is 176009.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 27720585025 + 3258583056 = 166495^2 + 57084^2 .

It is not a de Polignac number, because 30979168081 - 2⁵ = 30979168049 is a prime.

It is a super-2 number, since 2×30979168081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30979168981) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 436326276 + ... + 436326346.

Almost surely, 2^30979168081 is an apocalyptic number.

30979168081 is the 176009-th square number.

30979168081 is the 88005-th centered octagonal number.

It is an amenable number.

30979168081 is a deficient number, since it is larger than the sum of its proper divisors (1803848906).

30979168081 is an frugal number, since it uses more digits than its factorization.

30979168081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 30979168081 in words is "thirty billion, nine hundred seventy-nine million, one hundred sixty-eight thousand, eighty-one".