25613312426 has 16 divisors (see below), whose sum is σ = 41381020968. Its totient is φ = 11819908800.

The previous prime is 25613312411. The next prime is 25613312443. The reversal of 25613312426 is 62421331652.

It can be written as a sum of positive squares in 4 ways, for example, as 18674589025 + 6938723401 = 136655^2 + 83299^2 .

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, 137636 + ... + 264896.

Almost surely, 2^25613312426 is an apocalyptic number.

25613312426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25613312426 is a deficient number, since it is larger than the sum of its proper divisors (15767708542).

25613312426 is a wasteful number, since it uses less digits than its factorization.

25613312426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135017.

The product of its digits is 51840, while the sum is 35.

The spelling of 25613312426 in words is "twenty-five billion, six hundred thirteen million, three hundred twelve thousand, four hundred twenty-six".