74861795891 has 4 divisors (see below), whose sum is σ = 75140092800. Its totient is φ = 74583498984.

The previous prime is 74861795881. The next prime is 74861795923. The reversal of 74861795891 is 19859716847.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74861795891 - 2²⁶ = 74794687027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74861795881) 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, 139148051 + ... + 139148588.

It is an arithmetic number, because the mean of its divisors is an integer number (18785023200).

Almost surely, 2^74861795891 is an apocalyptic number.

74861795891 is a deficient number, since it is larger than the sum of its proper divisors (278296909).

74861795891 is a wasteful number, since it uses less digits than its factorization.

74861795891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278296908.

The product of its digits is 30481920, while the sum is 65.

The spelling of 74861795891 in words is "seventy-four billion, eight hundred sixty-one million, seven hundred ninety-five thousand, eight hundred ninety-one".