421717735128 has 32 divisors (see below), whose sum is σ = 1058705625600. Its totient is φ = 139984406688.

The previous prime is 421717735099. The next prime is 421717735171. The reversal of 421717735128 is 821537717124.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 36754876 + ... + 36766347.

It is an arithmetic number, because the mean of its divisors is an integer number (33084550800).

Almost surely, 2^421717735128 is an apocalyptic number.

It is an amenable number.

421717735128 is an abundant number, since it is smaller than the sum of its proper divisors (636987890472).

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

421717735128 is a wasteful number, since it uses less digits than its factorization.

421717735128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73521471 (or 73521467 counting only the distinct ones).

The product of its digits is 658560, while the sum is 48.

The spelling of 421717735128 in words is "four hundred twenty-one billion, seven hundred seventeen million, seven hundred thirty-five thousand, one hundred twenty-eight".