6479968440 has 128 divisors (see below), whose sum is σ = 21891409920. Its totient is φ = 1520217600.

The previous prime is 6479968433. The next prime is 6479968459. The reversal of 6479968440 is 448699746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38259 + ... + 120098.

It is an arithmetic number, because the mean of its divisors is an integer number (171026640).

Almost surely, 2^6479968440 is an apocalyptic number.

6479968440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6479968440 is an abundant number, since it is smaller than the sum of its proper divisors (15411441480).

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

6479968440 is a wasteful number, since it uses less digits than its factorization.

6479968440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158413 (or 158409 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 57.

The square root of 6479968440 is about 80498.2511611277. The cubic root of 6479968440 is about 1864.3364768928.

The spelling of 6479968440 in words is "six billion, four hundred seventy-nine million, nine hundred sixty-eight thousand, four hundred forty".