6446370744 has 160 divisors (see below), whose sum is σ = 19880348400. Its totient is φ = 1935290880.

The previous prime is 6446370731. The next prime is 6446370751. The reversal of 6446370744 is 4470736446.

6446370744 is a `hidden beast` number, since 6 + 4 + 4 + 637 + 0 + 7 + 4 + 4 = 666.

It is a super-2 number, since 2×6446370744² = 83111391538198227072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6446370744.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 772804 + ... + 781100.

Almost surely, 2^6446370744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6446370744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9940174200).

6446370744 is an abundant number, since it is smaller than the sum of its proper divisors (13433977656).

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

6446370744 is a wasteful number, since it uses less digits than its factorization.

6446370744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8435 (or 8422 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 45.

The square root of 6446370744 is about 80289.2940808424. The cubic root of 6446370744 is about 1861.1087873870.

The spelling of 6446370744 in words is "six billion, four hundred forty-six million, three hundred seventy thousand, seven hundred forty-four".