6479989944 has 64 divisors (see below), whose sum is σ = 16626435840. Its totient is φ = 2103870720.

The previous prime is 6479989937. The next prime is 6479989949. The reversal of 6479989944 is 4499899746.

It is a super-2 number, since 2×6479989944² = 83980539348682246272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6479989949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118524 + ... + 164340.

It is an arithmetic number, because the mean of its divisors is an integer number (259788060).

Almost surely, 2^6479989944 is an apocalyptic number.

It is an amenable number.

6479989944 is an abundant number, since it is smaller than the sum of its proper divisors (10146445896).

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

6479989944 is a wasteful number, since it uses less digits than its factorization.

6479989944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45980 (or 45976 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 69.

The square root of 6479989944 is about 80498.3847291360. The cubic root of 6479989944 is about 1864.3385391789.

The spelling of 6479989944 in words is "six billion, four hundred seventy-nine million, nine hundred eighty-nine thousand, nine hundred forty-four".