74180918161 has 12 divisors (see below), whose sum is σ = 87580033968. Its totient is φ = 62634631752.

The previous prime is 74180918143. The next prime is 74180918173. The reversal of 74180918161 is 16181908147.

It is not a de Polignac number, because 74180918161 - 2¹⁷ = 74180787089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74180912161) 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, 11294451 + ... + 11301016.

It is an arithmetic number, because the mean of its divisors is an integer number (7298336164).

Almost surely, 2^74180918161 is an apocalyptic number.

It is an amenable number.

74180918161 is a deficient number, since it is larger than the sum of its proper divisors (13399115807).

74180918161 is a wasteful number, since it uses less digits than its factorization.

74180918161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22595548 (or 22595541 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 46.

The spelling of 74180918161 in words is "seventy-four billion, one hundred eighty million, nine hundred eighteen thousand, one hundred sixty-one".