30031978512 has 80 divisors (see below), whose sum is σ = 83206906560. Its totient is φ = 9304828416.

The previous prime is 30031978481. The next prime is 30031978517. The reversal of 30031978512 is 21587913003.

It is not an unprimeable number, because it can be changed into a prime (30031978517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262323 + ... + 358994.

It is an arithmetic number, because the mean of its divisors is an integer number (1040086332).

Almost surely, 2^30031978512 is an apocalyptic number.

It is an amenable number.

30031978512 is an abundant number, since it is smaller than the sum of its proper divisors (53174928048).

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

30031978512 is a wasteful number, since it uses less digits than its factorization.

30031978512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621400 (or 621394 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 30031978512 in words is "thirty billion, thirty-one million, nine hundred seventy-eight thousand, five hundred twelve".