2556671725 has 12 divisors (see below), whose sum is σ = 3174766420. Its totient is φ = 2042438400.

The previous prime is 2556671699. The next prime is 2556671753. The reversal of 2556671725 is 5271766552.

It can be written as a sum of positive squares in 6 ways, for example, as 194128489 + 2362543236 = 13933^2 + 48606^2 .

It is not a de Polignac number, because 2556671725 - 2⁹ = 2556671213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54396 + ... + 89845.

Almost surely, 2^2556671725 is an apocalyptic number.

2556671725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2556671725 is a deficient number, since it is larger than the sum of its proper divisors (618094695).

2556671725 is a wasteful number, since it uses less digits than its factorization.

2556671725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144960 (or 144955 counting only the distinct ones).

The product of its digits is 882000, while the sum is 46.

The square root of 2556671725 is about 50563.5414602261. The cubic root of 2556671725 is about 1367.3876595916.

The spelling of 2556671725 in words is "two billion, five hundred fifty-six million, six hundred seventy-one thousand, seven hundred twenty-five".