421904628216 has 48 divisors (see below), whose sum is σ = 1143764724960. Its totient is φ = 140498709120.

The previous prime is 421904628203. The next prime is 421904628221. The reversal of 421904628216 is 612826409124.

It is a happy number.

421904628216 is a `hidden beast` number, since 4 + 2 + 1 + 9 + 0 + 4 + 628 + 2 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2761920 + ... + 2910671.

It is an arithmetic number, because the mean of its divisors is an integer number (23828431770).

Almost surely, 2^421904628216 is an apocalyptic number.

It is an amenable number.

421904628216 is an abundant number, since it is smaller than the sum of its proper divisors (721860096744).

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

421904628216 is a wasteful number, since it uses less digits than its factorization.

421904628216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5673636 (or 5673629 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 421904628216 in words is "four hundred twenty-one billion, nine hundred four million, six hundred twenty-eight thousand, two hundred sixteen".