6479039888 has 20 divisors (see below), whose sum is σ = 12555280860. Its totient is φ = 3238967424.

The previous prime is 6479039869. The next prime is 6479039891. The reversal of 6479039888 is 8889309746.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2063703184 + 4415336704 = 45428^2 + 66448^2 .

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6479039888.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72206 + ... + 134802.

It is an arithmetic number, because the mean of its divisors is an integer number (627764043).

Almost surely, 2^6479039888 is an apocalyptic number.

It is an amenable number.

6479039888 is a deficient number, since it is larger than the sum of its proper divisors (6076240972).

6479039888 is a wasteful number, since it uses less digits than its factorization.

6479039888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69074 (or 69068 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 62.

The square root of 6479039888 is about 80492.4834254727. The cubic root of 6479039888 is about 1864.2474221350.

The spelling of 6479039888 in words is "six billion, four hundred seventy-nine million, thirty-nine thousand, eight hundred eighty-eight".