25550911887 has 16 divisors (see below), whose sum is σ = 34303836672. Its totient is φ = 16916032800.

The previous prime is 25550911871. The next prime is 25550911901. The reversal of 25550911887 is 78811905552.

It is not a de Polignac number, because 25550911887 - 2⁴ = 25550911871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25550911817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2039958 + ... + 2052444.

It is an arithmetic number, because the mean of its divisors is an integer number (2143989792).

Almost surely, 2^25550911887 is an apocalyptic number.

25550911887 is a deficient number, since it is larger than the sum of its proper divisors (8752924785).

25550911887 is a wasteful number, since it uses less digits than its factorization.

25550911887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17158.

The product of its (nonzero) digits is 1008000, while the sum is 51.

The spelling of 25550911887 in words is "twenty-five billion, five hundred fifty million, nine hundred eleven thousand, eight hundred eighty-seven".