25611120613 has 8 divisors (see below), whose sum is σ = 28326645368. Its totient is φ = 23002087104.

The previous prime is 25611120599. The next prime is 25611120631. The reversal of 25611120613 is 31602111652.

It can be written as a sum of positive squares in 4 ways, for example, as 10989957889 + 14621162724 = 104833^2 + 120918^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25611120613 - 2¹⁷ = 25610989541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25611120643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26622306 + ... + 26623267.

It is an arithmetic number, because the mean of its divisors is an integer number (3540830671).

Almost surely, 2^25611120613 is an apocalyptic number.

It is an amenable number.

25611120613 is a deficient number, since it is larger than the sum of its proper divisors (2715524755).

25611120613 is a wasteful number, since it uses less digits than its factorization.

25611120613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53245623.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 25611120613 in words is "twenty-five billion, six hundred eleven million, one hundred twenty thousand, six hundred thirteen".