30981165168 has 20 divisors (see below), whose sum is σ = 80034676808. Its totient is φ = 10327055040.

The previous prime is 30981165161. The next prime is 30981165181. The reversal of 30981165168 is 86156118903.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 645440941 = 30981165168 / (3 + 0 + 9 + 8 + 1 + 1 + 6 + 5 + 1 + 6 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30981165161) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 322720423 + ... + 322720518.

Almost surely, 2^30981165168 is an apocalyptic number.

It is an amenable number.

30981165168 is an abundant number, since it is smaller than the sum of its proper divisors (49053511640).

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

30981165168 is a wasteful number, since it uses less digits than its factorization.

30981165168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645440952 (or 645440946 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 30981165168 in words is "thirty billion, nine hundred eighty-one million, one hundred sixty-five thousand, one hundred sixty-eight".