621974352799 has 4 divisors (see below), whose sum is σ = 626093388400. Its totient is φ = 617855317200.

The previous prime is 621974352751. The next prime is 621974352803. The reversal of 621974352799 is 997253479126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621974352799 - 2²⁷ = 621840135071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621974352799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621974352739) 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, 2059517574 + ... + 2059517875.

It is an arithmetic number, because the mean of its divisors is an integer number (156523347100).

Almost surely, 2^621974352799 is an apocalyptic number.

621974352799 is a deficient number, since it is larger than the sum of its proper divisors (4119035601).

621974352799 is a wasteful number, since it uses less digits than its factorization.

621974352799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119035600.

The product of its digits is 51438240, while the sum is 64.

The spelling of 621974352799 in words is "six hundred twenty-one billion, nine hundred seventy-four million, three hundred fifty-two thousand, seven hundred ninety-nine".