421780828716 has 72 divisors (see below), whose sum is σ = 1148409029040. Its totient is φ = 129752959104.

The previous prime is 421780828697. The next prime is 421780828751. The reversal of 421780828716 is 617828087124.

421780828716 is a `hidden beast` number, since 421 + 78 + 0 + 82 + 8 + 71 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2341611 + ... + 2515293.

Almost surely, 2^421780828716 is an apocalyptic number.

It is an amenable number.

421780828716 is an abundant number, since it is smaller than the sum of its proper divisors (726628200324).

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

421780828716 is a wasteful number, since it uses less digits than its factorization.

421780828716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178895 (or 178890 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 54.

The spelling of 421780828716 in words is "four hundred twenty-one billion, seven hundred eighty million, eight hundred twenty-eight thousand, seven hundred sixteen".