621562134612 has 24 divisors (see below), whose sum is σ = 1455826147776. Its totient is φ = 206399592448.

The previous prime is 621562134581. The next prime is 621562134623. The reversal of 621562134612 is 216431265126.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 98469933 + ... + 98476244.

It is an arithmetic number, because the mean of its divisors is an integer number (60659422824).

Almost surely, 2^621562134612 is an apocalyptic number.

It is an amenable number.

621562134612 is an abundant number, since it is smaller than the sum of its proper divisors (834264013164).

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

621562134612 is a wasteful number, since it uses less digits than its factorization.

621562134612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196946447 (or 196946445 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

Adding to 621562134612 its reverse (216431265126), we get a palindrome (837993399738).

The spelling of 621562134612 in words is "six hundred twenty-one billion, five hundred sixty-two million, one hundred thirty-four thousand, six hundred twelve".