6446979444 has 24 divisors (see below), whose sum is σ = 15561675360. Its totient is φ = 2074889824.

The previous prime is 6446979437. The next prime is 6446979503. The reversal of 6446979444 is 4449796446.

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, 9262554 + ... + 9263249.

It is an arithmetic number, because the mean of its divisors is an integer number (648403140).

Almost surely, 2^6446979444 is an apocalyptic number.

It is an amenable number.

6446979444 is an abundant number, since it is smaller than the sum of its proper divisors (9114695916).

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

6446979444 is a wasteful number, since it uses less digits than its factorization.

6446979444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18525839 (or 18525837 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 57.

The square root of 6446979444 is about 80293.0846586429. The cubic root of 6446979444 is about 1861.1673640812.

The spelling of 6446979444 in words is "six billion, four hundred forty-six million, nine hundred seventy-nine thousand, four hundred forty-four".