621057544631 has 16 divisors (see below), whose sum is σ = 683116918848. Its totient is φ = 562236057600.

The previous prime is 621057544579. The next prime is 621057544703. The reversal of 621057544631 is 136445750126.

It is a cyclic number.

It is not a de Polignac number, because 621057544631 - 2⁶ = 621057544567 is a prime.

It is a super-2 number, since 2×621057544631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621057544531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6225470 + ... + 6324443.

It is an arithmetic number, because the mean of its divisors is an integer number (42694807428).

Almost surely, 2^621057544631 is an apocalyptic number.

621057544631 is a deficient number, since it is larger than the sum of its proper divisors (62059374217).

621057544631 is a wasteful number, since it uses less digits than its factorization.

621057544631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12550042.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 621057544631 in words is "six hundred twenty-one billion, fifty-seven million, five hundred forty-four thousand, six hundred thirty-one".