25161522855 has 16 divisors (see below), whose sum is σ = 46009641984. Its totient is φ = 11502410400.

The previous prime is 25161522823. The next prime is 25161522907. The reversal of 25161522855 is 55822516152.

It is not a de Polignac number, because 25161522855 - 2⁵ = 25161522823 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119816671 + ... + 119816880.

It is an arithmetic number, because the mean of its divisors is an integer number (2875602624).

Almost surely, 2^25161522855 is an apocalyptic number.

25161522855 is a deficient number, since it is larger than the sum of its proper divisors (20848119129).

25161522855 is a wasteful number, since it uses less digits than its factorization.

25161522855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239633566.

The product of its digits is 240000, while the sum is 42.

The spelling of 25161522855 in words is "twenty-five billion, one hundred sixty-one million, five hundred twenty-two thousand, eight hundred fifty-five".