25315245655 has 16 divisors (see below), whose sum is σ = 34971474240. Its totient is φ = 17232314112.

The previous prime is 25315245617. The next prime is 25315245689. The reversal of 25315245655 is 55654251352.

It is a cyclic number.

It is not a de Polignac number, because 25315245655 - 2²⁵ = 25281691223 is a prime.

It is a super-3 number, since 3×25315245655³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2634960 + ... + 2644549.

It is an arithmetic number, because the mean of its divisors is an integer number (2185717140).

Almost surely, 2^25315245655 is an apocalyptic number.

25315245655 is a deficient number, since it is larger than the sum of its proper divisors (9656228585).

25315245655 is a wasteful number, since it uses less digits than its factorization.

25315245655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5279658.

The product of its digits is 900000, while the sum is 43.

The spelling of 25315245655 in words is "twenty-five billion, three hundred fifteen million, two hundred forty-five thousand, six hundred fifty-five".