25766617256 has 32 divisors (see below), whose sum is σ = 51623649000. Its totient is φ = 12014217216.

The previous prime is 25766617243. The next prime is 25766617309. The reversal of 25766617256 is 65271666752.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20957194756 + 4809422500 = 144766^2 + 69350^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25766617198 and 25766617207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854261 + ... + 883908.

Almost surely, 2^25766617256 is an apocalyptic number.

It is an amenable number.

25766617256 is an abundant number, since it is smaller than the sum of its proper divisors (25857031744).

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

25766617256 is a wasteful number, since it uses less digits than its factorization.

25766617256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738301 (or 1738297 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 53.

The spelling of 25766617256 in words is "twenty-five billion, seven hundred sixty-six million, six hundred seventeen thousand, two hundred fifty-six".