421983646875 has 288 divisors, whose sum is σ = 926775682560. Its totient is φ = 180714240000.

The previous prime is 421983646811. The next prime is 421983646879. The reversal of 421983646875 is 578646389124.

421983646875 is a `hidden beast` number, since 4 + 2 + 198 + 364 + 6 + 87 + 5 = 666.

It is not a de Polignac number, because 421983646875 - 2⁶ = 421983646811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (421983646879) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 362840044 + ... + 362841206.

It is an arithmetic number, because the mean of its divisors is an integer number (3217971120).

Almost surely, 2^421983646875 is an apocalyptic number.

421983646875 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421983646875 is an abundant number, since it is smaller than the sum of its proper divisors (504792035685).

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

421983646875 is a wasteful number, since it uses less digits than its factorization.

421983646875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1294 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 421983646875 in words is "four hundred twenty-one billion, nine hundred eighty-three million, six hundred forty-six thousand, eight hundred seventy-five".