25255891515155 has 16 divisors (see below), whose sum is σ = 34636738445760. Its totient is φ = 17318281997952.

The previous prime is 25255891515149. The next prime is 25255891515191. The reversal of 25255891515155 is 55151519855252.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25255891515155 - 2⁶ = 25255891515091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25255891515094 and 25255891515103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19901117 + ... + 21132113.

It is an arithmetic number, because the mean of its divisors is an integer number (2164796152860).

Almost surely, 2^{25255891515155} is an apocalyptic number.

25255891515155 is a deficient number, since it is larger than the sum of its proper divisors (9380846930605).

25255891515155 is a wasteful number, since it uses less digits than its factorization.

25255891515155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817198.

The product of its digits is 22500000, while the sum is 59.

The spelling of 25255891515155 in words is "twenty-five trillion, two hundred fifty-five billion, eight hundred ninety-one million, five hundred fifteen thousand, one hundred fifty-five".