621256994704 has 40 divisors (see below), whose sum is σ = 1214869392440. Its totient is φ = 307742976000.

The previous prime is 621256994627. The next prime is 621256994737. The reversal of 621256994704 is 407499652126.

It can be written as a sum of positive squares in 4 ways, for example, as 231040000 + 621025954704 = 15200^2 + 788052^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21333754 + ... + 21362854.

It is an arithmetic number, because the mean of its divisors is an integer number (30371734811).

Almost surely, 2^621256994704 is an apocalyptic number.

It is an amenable number.

621256994704 is a deficient number, since it is larger than the sum of its proper divisors (593612397736).

621256994704 is a wasteful number, since it uses less digits than its factorization.

621256994704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41459 (or 41453 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 621256994704 in words is "six hundred twenty-one billion, two hundred fifty-six million, nine hundred ninety-four thousand, seven hundred four".