25115215255 has 16 divisors (see below), whose sum is σ = 32489420544. Its totient is φ = 18527857920.

The previous prime is 25115215249. The next prime is 25115215259. The reversal of 25115215255 is 55251251152.

It is not a de Polignac number, because 25115215255 - 2³ = 25115215247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25115215255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25115215259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130534 + ... + 259363.

It is an arithmetic number, because the mean of its divisors is an integer number (2030588784).

Almost surely, 2^25115215255 is an apocalyptic number.

25115215255 is a deficient number, since it is larger than the sum of its proper divisors (7374205289).

25115215255 is a wasteful number, since it uses less digits than its factorization.

25115215255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390906.

The product of its digits is 25000, while the sum is 34.

The spelling of 25115215255 in words is "twenty-five billion, one hundred fifteen million, two hundred fifteen thousand, two hundred fifty-five".