25748406856 has 64 divisors (see below), whose sum is σ = 52636057200. Its totient is φ = 11758804992.

The previous prime is 25748406851. The next prime is 25748406877. The reversal of 25748406856 is 65860484752.

It can be written as a sum of positive squares in 8 ways, for example, as 24245604100 + 1502802756 = 155710^2 + 38766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25748406797 and 25748406806.

It is not an unprimeable number, because it can be changed into a prime (25748406851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1991260 + ... + 2004148.

Almost surely, 2^25748406856 is an apocalyptic number.

It is an amenable number.

25748406856 is an abundant number, since it is smaller than the sum of its proper divisors (26887650344).

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

25748406856 is a wasteful number, since it uses less digits than its factorization.

25748406856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346 (or 13342 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 55.

The spelling of 25748406856 in words is "twenty-five billion, seven hundred forty-eight million, four hundred six thousand, eight hundred fifty-six".