6425172856 has 16 divisors (see below), whose sum is σ = 12053638800. Its totient is φ = 3210869184.

The previous prime is 6425172847. The next prime is 6425172893. The reversal of 6425172856 is 6582715246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198685 + ... + 228748.

It is an arithmetic number, because the mean of its divisors is an integer number (753352425).

Almost surely, 2^6425172856 is an apocalyptic number.

It is an amenable number.

6425172856 is a deficient number, since it is larger than the sum of its proper divisors (5628465944).

6425172856 is a wasteful number, since it uses less digits than its factorization.

6425172856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429318 (or 429314 counting only the distinct ones).

The product of its digits is 806400, while the sum is 46.

The square root of 6425172856 is about 80157.1759482581. The cubic root of 6425172856 is about 1859.0665582615.

The spelling of 6425172856 in words is "six billion, four hundred twenty-five million, one hundred seventy-two thousand, eight hundred fifty-six".