621650574508 has 6 divisors (see below), whose sum is σ = 1087888505396. Its totient is φ = 310825287252.

The previous prime is 621650574469. The next prime is 621650574521. The reversal of 621650574508 is 805475056126.

621650574508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×621650574508² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77706321810 + ... + 77706321817.

Almost surely, 2^621650574508 is an apocalyptic number.

It is an amenable number.

621650574508 is a deficient number, since it is larger than the sum of its proper divisors (466237930888).

621650574508 is a wasteful number, since it uses less digits than its factorization.

621650574508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155412643631 (or 155412643629 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 621650574508 in words is "six hundred twenty-one billion, six hundred fifty million, five hundred seventy-four thousand, five hundred eight".