30721044416 has 14 divisors (see below), whose sum is σ = 60962072640. Its totient is φ = 15360522176.

The previous prime is 30721044397. The next prime is 30721044427. The reversal of 30721044416 is 61444012703.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240008096 + ... + 240008223.

It is an arithmetic number, because the mean of its divisors is an integer number (4354433760).

Almost surely, 2^30721044416 is an apocalyptic number.

It is an amenable number.

30721044416 is a deficient number, since it is larger than the sum of its proper divisors (30241028224).

30721044416 is an equidigital number, since it uses as much as digits as its factorization.

30721044416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480016331 (or 480016321 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 30721044416 in words is "thirty billion, seven hundred twenty-one million, forty-four thousand, four hundred sixteen".