25513506613 has 8 divisors (see below), whose sum is σ = 29184979328. Its totient is φ = 21848705424.

The previous prime is 25513506611. The next prime is 25513506617. The reversal of 25513506613 is 31660531552.

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

It is not a de Polignac number, because 25513506613 - 2¹ = 25513506611 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 (25513506611) 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, 1659681 + ... + 1674982.

It is an arithmetic number, because the mean of its divisors is an integer number (3648122416).

Almost surely, 2^25513506613 is an apocalyptic number.

It is an amenable number.

25513506613 is a deficient number, since it is larger than the sum of its proper divisors (3671472715).

25513506613 is a wasteful number, since it uses less digits than its factorization.

25513506613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335763.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 25513506613 in words is "twenty-five billion, five hundred thirteen million, five hundred six thousand, six hundred thirteen".