25513865135 has 8 divisors (see below), whose sum is σ = 33399968976. Its totient is φ = 18555538240.

The previous prime is 25513865129. The next prime is 25513865159. The reversal of 25513865135 is 53156831552.

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

It is not a de Polignac number, because 25513865135 - 2¹² = 25513861039 is a prime.

It is a congruent number.

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, 231944174 + ... + 231944283.

It is an arithmetic number, because the mean of its divisors is an integer number (4174996122).

Almost surely, 2^25513865135 is an apocalyptic number.

25513865135 is a deficient number, since it is larger than the sum of its proper divisors (7886103841).

25513865135 is a wasteful number, since it uses less digits than its factorization.

25513865135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463888473.

The product of its digits is 540000, while the sum is 44.

The spelling of 25513865135 in words is "twenty-five billion, five hundred thirteen million, eight hundred sixty-five thousand, one hundred thirty-five".