25115403115 has 24 divisors (see below), whose sum is σ = 33138265104. Its totient is φ = 18259771200.

The previous prime is 25115403097. The next prime is 25115403119. The reversal of 25115403115 is 51130451152.

It is not a de Polignac number, because 25115403115 - 2¹⁹ = 25114878827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25115403119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2804545 + ... + 2813485.

It is an arithmetic number, because the mean of its divisors is an integer number (1380761046).

Almost surely, 2^25115403115 is an apocalyptic number.

25115403115 is a deficient number, since it is larger than the sum of its proper divisors (8022861989).

25115403115 is a wasteful number, since it uses less digits than its factorization.

25115403115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13611 (or 13600 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 25115403115 its reverse (51130451152), we get a palindrome (76245854267).

The spelling of 25115403115 in words is "twenty-five billion, one hundred fifteen million, four hundred three thousand, one hundred fifteen".