6640204444444 has 24 divisors (see below), whose sum is σ = 11704253742720. Its totient is φ = 3296133156336.

The previous prime is 6640204444411. The next prime is 6640204444451. The reversal of 6640204444444 is 4444444020466.

6640204444444 is a modest number, since divided by 4444444 gives 664020 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 6640204444394 and 6640204444403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25852419 + ... + 26108005.

It is an arithmetic number, because the mean of its divisors is an integer number (487677239280).

Almost surely, 2^{6640204444444} is an apocalyptic number.

It is an amenable number.

6640204444444 is a deficient number, since it is larger than the sum of its proper divisors (5064049298276).

6640204444444 is a wasteful number, since it uses less digits than its factorization.

6640204444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302457 (or 302455 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 46.

The spelling of 6640204444444 in words is "six trillion, six hundred forty billion, two hundred four million, four hundred forty-four thousand, four hundred forty-four".