621577868913 has 12 divisors (see below), whose sum is σ = 898156425088. Its totient is φ = 414236757240.

The previous prime is 621577868897. The next prime is 621577868953. The reversal of 621577868913 is 319868775126.

621577868913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 621577868913 - 2⁴ = 621577868897 is a prime.

It is a super-2 number, since 2×621577868913² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (621577868953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12347545 + ... + 12397782.

Almost surely, 2^621577868913 is an apocalyptic number.

It is an amenable number.

621577868913 is a deficient number, since it is larger than the sum of its proper divisors (276578556175).

621577868913 is a wasteful number, since it uses less digits than its factorization.

621577868913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24748124 (or 24748121 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The spelling of 621577868913 in words is "six hundred twenty-one billion, five hundred seventy-seven million, eight hundred sixty-eight thousand, nine hundred thirteen".