74643072420 has 48 divisors (see below), whose sum is σ = 238857833088. Its totient is φ = 17061273600.

The previous prime is 74643072401. The next prime is 74643072431. The reversal of 74643072420 is 2427034647.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88860381 + ... + 88861220.

It is an arithmetic number, because the mean of its divisors is an integer number (4976204856).

Almost surely, 2^74643072420 is an apocalyptic number.

74643072420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74643072420 is an abundant number, since it is smaller than the sum of its proper divisors (164214760668).

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

74643072420 is a wasteful number, since it uses less digits than its factorization.

74643072420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177721620 (or 177721618 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 39.

The spelling of 74643072420 in words is "seventy-four billion, six hundred forty-three million, seventy-two thousand, four hundred twenty".