421566404665124 has 12 divisors (see below), whose sum is σ = 747079704470400. Its totient is φ = 208115060530728.

The previous prime is 421566404665123. The next prime is 421566404665183.

421566404665124 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 421566404665124.

It is not an unprimeable number, because it can be changed into a prime (421566404665123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667035450104 + ... + 667035450735.

It is an arithmetic number, because the mean of its divisors is an integer number (62256642039200).

Almost surely, 2^{421566404665124} is an apocalyptic number.

It is an amenable number.

421566404665124 is a deficient number, since it is larger than the sum of its proper divisors (325513299805276).

421566404665124 is a wasteful number, since it uses less digits than its factorization.

421566404665124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334070900922 (or 1334070900920 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 56.

The spelling of 421566404665124 in words is "four hundred twenty-one trillion, five hundred sixty-six billion, four hundred four million, six hundred sixty-five thousand, one hundred twenty-four".