30128760055172 has 12 divisors (see below), whose sum is σ = 53209048722060. Its totient is φ = 14926174706016.

The previous prime is 30128760055171. The next prime is 30128760055183. The reversal of 30128760055172 is 27155006782103.

It can be written as a sum of positive squares in 2 ways, for example, as 11118863574016 + 19009896481156 = 3334496^2 + 4360034^2 .

It is not an unprimeable number, because it can be changed into a prime (30128760055171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34551329903 + ... + 34551330774.

It is an arithmetic number, because the mean of its divisors is an integer number (4434087393505).

Almost surely, 2^{30128760055172} is an apocalyptic number.

It is an amenable number.

30128760055172 is a deficient number, since it is larger than the sum of its proper divisors (23080288666888).

30128760055172 is a wasteful number, since it uses less digits than its factorization.

30128760055172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69102660790 (or 69102660788 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 30128760055172 in words is "thirty trillion, one hundred twenty-eight billion, seven hundred sixty million, fifty-five thousand, one hundred seventy-two".