30981206516 has 48 divisors (see below), whose sum is σ = 59509739520. Its totient is φ = 14026763520.

The previous prime is 30981206507. The next prime is 30981206533. The reversal of 30981206516 is 61560218903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561401 + ... + 614111.

It is an arithmetic number, because the mean of its divisors is an integer number (1239786240).

Almost surely, 2^30981206516 is an apocalyptic number.

It is an amenable number.

30981206516 is a deficient number, since it is larger than the sum of its proper divisors (28528533004).

30981206516 is a wasteful number, since it uses less digits than its factorization.

30981206516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52944 (or 52942 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 30981206516 in words is "thirty billion, nine hundred eighty-one million, two hundred six thousand, five hundred sixteen".