30331728864 has 36 divisors (see below), whose sum is σ = 86255854776. Its totient is φ = 10110576192.

The previous prime is 30331728853. The next prime is 30331728893. The reversal of 30331728864 is 46882713303.

30331728864 is a `hidden beast` number, since 30 + 331 + 7 + 288 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×30331728864³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52658964 + ... + 52659539.

It is an arithmetic number, because the mean of its divisors is an integer number (2395995966).

Almost surely, 2^30331728864 is an apocalyptic number.

It is an amenable number.

30331728864 is an abundant number, since it is smaller than the sum of its proper divisors (55924125912).

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

30331728864 is a wasteful number, since it uses less digits than its factorization.

30331728864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105318519 (or 105318508 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 30331728864 in words is "thirty billion, three hundred thirty-one million, seven hundred twenty-eight thousand, eight hundred sixty-four".