621367746436 has 12 divisors (see below), whose sum is σ = 1151357883228. Its totient is φ = 292408351232.

The previous prime is 621367746407. The next prime is 621367746473. The reversal of 621367746436 is 634647763126.

It can be written as a sum of positive squares in 2 ways, for example, as 512289473536 + 109078272900 = 715744^2 + 330270^2 .

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 3 ways as a sum of consecutive naturals, for example, 4568880421 + ... + 4568880556.

It is an arithmetic number, because the mean of its divisors is an integer number (95946490269).

Almost surely, 2^621367746436 is an apocalyptic number.

It is an amenable number.

621367746436 is a deficient number, since it is larger than the sum of its proper divisors (529990136792).

621367746436 is a wasteful number, since it uses less digits than its factorization.

621367746436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9137760998 (or 9137760996 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 55.

The spelling of 621367746436 in words is "six hundred twenty-one billion, three hundred sixty-seven million, seven hundred forty-six thousand, four hundred thirty-six".