75120016881 has 96 divisors (see below), whose sum is σ = 136341811200. Its totient is φ = 36326828160.

The previous prime is 75120016817. The next prime is 75120016949. The reversal of 75120016881 is 18861002157.

It is not a de Polignac number, because 75120016881 - 2⁶ = 75120016817 is a prime.

It is a super-2 number, since 2×75120016881² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (75120016781) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1092210 + ... + 1158948.

It is an arithmetic number, because the mean of its divisors is an integer number (1420227200).

Almost surely, 2^75120016881 is an apocalyptic number.

It is an amenable number.

75120016881 is a deficient number, since it is larger than the sum of its proper divisors (61221794319).

75120016881 is a wasteful number, since it uses less digits than its factorization.

75120016881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66819 (or 66812 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 39.

The spelling of 75120016881 in words is "seventy-five billion, one hundred twenty million, sixteen thousand, eight hundred eighty-one".