25531117915 has 8 divisors (see below), whose sum is σ = 31969399968. Its totient is φ = 19536855360.

The previous prime is 25531117903. The next prime is 25531117921. The reversal of 25531117915 is 51971113552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25531117915 - 2¹¹ = 25531115867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111004746 + ... + 111004975.

It is an arithmetic number, because the mean of its divisors is an integer number (3996174996).

Almost surely, 2^25531117915 is an apocalyptic number.

25531117915 is a deficient number, since it is larger than the sum of its proper divisors (6438282053).

25531117915 is a wasteful number, since it uses less digits than its factorization.

25531117915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222009749.

The product of its digits is 47250, while the sum is 40.

The spelling of 25531117915 in words is "twenty-five billion, five hundred thirty-one million, one hundred seventeen thousand, nine hundred fifteen".