621326440445607 has 48 divisors (see below), whose sum is σ = 977888172381120. Its totient is φ = 377857183689216.

The previous prime is 621326440445593. The next prime is 621326440445611. The reversal of 621326440445607 is 706544044623126.

621326440445607 is a `hidden beast` number, since 6 + 2 + 1 + 3 + 26 + 4 + 4 + 0 + 4 + 4 + 5 + 607 = 666.

It is not a de Polignac number, because 621326440445607 - 2⁴ = 621326440445591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621326440445687) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3650598 + ... + 35439804.

It is an arithmetic number, because the mean of its divisors is an integer number (20372670257940).

Almost surely, 2^{621326440445607} is an apocalyptic number.

621326440445607 is a deficient number, since it is larger than the sum of its proper divisors (356561731935513).

621326440445607 is a wasteful number, since it uses less digits than its factorization.

621326440445607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31791192 (or 31791189 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 54.

The spelling of 621326440445607 in words is "six hundred twenty-one trillion, three hundred twenty-six billion, four hundred forty million, four hundred forty-five thousand, six hundred seven".