30715573128 has 32 divisors (see below), whose sum is σ = 80830456800. Its totient is φ = 9699654528.

The previous prime is 30715573067. The next prime is 30715573159. The reversal of 30715573128 is 82137551703.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30715573128.

It is an unprimeable number.

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, 33678901 + ... + 33679812.

It is an arithmetic number, because the mean of its divisors is an integer number (2525951775).

Almost surely, 2^30715573128 is an apocalyptic number.

30715573128 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30715573128 is an abundant number, since it is smaller than the sum of its proper divisors (50114883672).

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

30715573128 is a wasteful number, since it uses less digits than its factorization.

30715573128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67358741 (or 67358737 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 30715573128 in words is "thirty billion, seven hundred fifteen million, five hundred seventy-three thousand, one hundred twenty-eight".