6478120725 has 24 divisors (see below), whose sum is σ = 11340524160. Its totient is φ = 3251761920.

The previous prime is 6478120679. The next prime is 6478120741. The reversal of 6478120725 is 5270218746.

It is not a de Polignac number, because 6478120725 - 2¹⁸ = 6477858581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2539165 + ... + 2541714.

It is an arithmetic number, because the mean of its divisors is an integer number (472521840).

Almost surely, 2^6478120725 is an apocalyptic number.

It is an amenable number.

6478120725 is a deficient number, since it is larger than the sum of its proper divisors (4862403435).

6478120725 is a wasteful number, since it uses less digits than its factorization.

6478120725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080909 (or 5080904 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 6478120725 is about 80486.7736028722. The cubic root of 6478120725 is about 1864.1592594689.

The spelling of 6478120725 in words is "six billion, four hundred seventy-eight million, one hundred twenty thousand, seven hundred twenty-five".