621266359938 has 16 divisors (see below), whose sum is σ = 1420037394240. Its totient is φ = 177504674256.

The previous prime is 621266359843. The next prime is 621266359939. The reversal of 621266359938 is 839953662126.

It is a happy number.

It is a super-2 number, since 2×621266359938² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621266359939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7396028053 + ... + 7396028136.

It is an arithmetic number, because the mean of its divisors is an integer number (88752337140).

Almost surely, 2^621266359938 is an apocalyptic number.

621266359938 is an abundant number, since it is smaller than the sum of its proper divisors (798771034302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621266359938 is a wasteful number, since it uses less digits than its factorization.

621266359938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14792056201.

The product of its digits is 25194240, while the sum is 60.

The spelling of 621266359938 in words is "six hundred twenty-one billion, two hundred sixty-six million, three hundred fifty-nine thousand, nine hundred thirty-eight".