6261644636512 has 24 divisors (see below), whose sum is σ = 12338728920000. Its totient is φ = 3127999196544.

The previous prime is 6261644636479. The next prime is 6261644636519. The reversal of 6261644636512 is 2156364461626.

It is a super-2 number, since 2×6261644636512² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6261644636512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6261644636519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88186512 + ... + 88257487.

It is an arithmetic number, because the mean of its divisors is an integer number (514113705000).

Almost surely, 2^{6261644636512} is an apocalyptic number.

It is an amenable number.

6261644636512 is a deficient number, since it is larger than the sum of its proper divisors (6077084283488).

6261644636512 is a wasteful number, since it uses less digits than its factorization.

6261644636512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176445118 (or 176445110 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 52.

The spelling of 6261644636512 in words is "six trillion, two hundred sixty-one billion, six hundred forty-four million, six hundred thirty-six thousand, five hundred twelve".