25996117155 has 32 divisors (see below), whose sum is σ = 42327290880. Its totient is φ = 13620650880.

The previous prime is 25996117153. The next prime is 25996117177. The reversal of 25996117155 is 55171169952.

It is a happy number.

It is not a de Polignac number, because 25996117155 - 2¹ = 25996117153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25996117098 and 25996117107.

It is not an unprimeable number, because it can be changed into a prime (25996117153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 750754 + ... + 784616.

It is an arithmetic number, because the mean of its divisors is an integer number (1322727840).

Almost surely, 2^25996117155 is an apocalyptic number.

25996117155 is a deficient number, since it is larger than the sum of its proper divisors (16331173725).

25996117155 is a wasteful number, since it uses less digits than its factorization.

25996117155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34771.

The product of its digits is 850500, while the sum is 51.

The spelling of 25996117155 in words is "twenty-five billion, nine hundred ninety-six million, one hundred seventeen thousand, one hundred fifty-five".