74856108021 has 16 divisors (see below), whose sum is σ = 105318110400. Its totient is φ = 47161934208.

The previous prime is 74856108017. The next prime is 74856108023. The reversal of 74856108021 is 12080165847.

It is not a de Polignac number, because 74856108021 - 2² = 74856108017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74856108023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1582146 + ... + 1628771.

It is an arithmetic number, because the mean of its divisors is an integer number (6582381900).

Almost surely, 2^74856108021 is an apocalyptic number.

It is an amenable number.

74856108021 is a deficient number, since it is larger than the sum of its proper divisors (30462002379).

74856108021 is a wasteful number, since it uses less digits than its factorization.

74856108021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211348.

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 74856108021 in words is "seventy-four billion, eight hundred fifty-six million, one hundred eight thousand, twenty-one".