421173216504 has 48 divisors (see below), whose sum is σ = 1141085247120. Its totient is φ = 140340883200.

The previous prime is 421173216407. The next prime is 421173216511. The reversal of 421173216504 is 405612371124.

421173216504 is a `hidden beast` number, since 4 + 2 + 117 + 32 + 1 + 6 + 504 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 842532 + ... + 1245875.

It is an arithmetic number, because the mean of its divisors is an integer number (23772609315).

Almost surely, 2^421173216504 is an apocalyptic number.

It is an amenable number.

421173216504 is an abundant number, since it is smaller than the sum of its proper divisors (719912030616).

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

421173216504 is a wasteful number, since it uses less digits than its factorization.

421173216504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091220 (or 2091213 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

Adding to 421173216504 its reverse (405612371124), we get a palindrome (826785587628).

The spelling of 421173216504 in words is "four hundred twenty-one billion, one hundred seventy-three million, two hundred sixteen thousand, five hundred four".