74574573920 has 144 divisors (see below), whose sum is σ = 223578705168. Its totient is φ = 23243996160.

The previous prime is 74574573907. The next prime is 74574573923. The reversal of 74574573920 is 2937547547.

It is a super-2 number, since 2×74574573920² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74574573923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346127 + ... + 518606.

It is an arithmetic number, because the mean of its divisors is an integer number (1552629897).

Almost surely, 2^74574573920 is an apocalyptic number.

74574573920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74574573920 is an abundant number, since it is smaller than the sum of its proper divisors (149004131248).

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

74574573920 is a wasteful number, since it uses less digits than its factorization.

74574573920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864773 (or 864758 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 74574573920 in words is "seventy-four billion, five hundred seventy-four million, five hundred seventy-three thousand, nine hundred twenty".