30979637680 has 40 divisors (see below), whose sum is σ = 72055200672. Its totient is φ = 12387116544.

The previous prime is 30979637657. The next prime is 30979637683. The reversal of 30979637680 is 8673697903.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (30979637683) 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 7 ways as a sum of consecutive naturals, for example, 140332 + ... + 285748.

Almost surely, 2^30979637680 is an apocalyptic number.

It is an amenable number.

30979637680 is an abundant number, since it is smaller than the sum of its proper divisors (41075562992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30979637680 is a wasteful number, since it uses less digits than its factorization.

30979637680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148093 (or 148087 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 58.

The spelling of 30979637680 in words is "thirty billion, nine hundred seventy-nine million, six hundred thirty-seven thousand, six hundred eighty".