74574573918 has 64 divisors (see below), whose sum is σ = 162469226304. Its totient is φ = 22682880000.

The previous prime is 74574573907. The next prime is 74574573923. The reversal of 74574573918 is 81937547547.

It is a super-2 number, since 2×74574573918² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5200198 + ... + 5214518.

It is an arithmetic number, because the mean of its divisors is an integer number (2538581661).

Almost surely, 2^74574573918 is an apocalyptic number.

74574573918 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74574573918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81234613152).

74574573918 is an abundant number, since it is smaller than the sum of its proper divisors (87894652386).

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

74574573918 is a wasteful number, since it uses less digits than its factorization.

74574573918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15101.

The product of its digits is 29635200, while the sum is 60.

The spelling of 74574573918 in words is "seventy-four billion, five hundred seventy-four million, five hundred seventy-three thousand, nine hundred eighteen".