30172661073 has 12 divisors (see below), whose sum is σ = 43584861060. Its totient is φ = 20114125056.

The previous prime is 30172661063. The next prime is 30172661093. The reversal of 30172661073 is 37016627103.

30172661073 is a `hidden beast` number, since 3 + 0 + 17 + 26 + 610 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 853633089 + 29319027984 = 29217^2 + 171228^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30172661073 is a prime.

It is a super-2 number, since 2×30172661073² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30172661033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146073 + ... + 285801.

It is an arithmetic number, because the mean of its divisors is an integer number (3632071755).

Almost surely, 2^30172661073 is an apocalyptic number.

It is an amenable number.

30172661073 is a deficient number, since it is larger than the sum of its proper divisors (13412199987).

30172661073 is a wasteful number, since it uses less digits than its factorization.

30172661073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163728 (or 163725 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The spelling of 30172661073 in words is "thirty billion, one hundred seventy-two million, six hundred sixty-one thousand, seventy-three".