6264644006440 has 64 divisors (see below), whose sum is σ = 14103914529600. Its totient is φ = 2504353187328.

The previous prime is 6264644006429. The next prime is 6264644006479. The reversal of 6264644006440 is 446004464626.

It is a super-2 number, since 2×6264644006440² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659639772 + ... + 659649268.

It is an arithmetic number, because the mean of its divisors is an integer number (220373664525).

Almost surely, 2^{6264644006440} is an apocalyptic number.

It is an amenable number.

6264644006440 is an abundant number, since it is smaller than the sum of its proper divisors (7839270523160).

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

6264644006440 is a wasteful number, since it uses less digits than its factorization.

6264644006440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17674 (or 17670 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 46.

The spelling of 6264644006440 in words is "six trillion, two hundred sixty-four billion, six hundred forty-four million, six thousand, four hundred forty".