25550550525 has 24 divisors (see below), whose sum is σ = 42285078304. Its totient is φ = 13613572800.

The previous prime is 25550550511. The next prime is 25550550541. The reversal of 25550550525 is 52505505552.

It is not a de Polignac number, because 25550550525 - 2¹⁰ = 25550549501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90259 + ... + 243408.

Almost surely, 2^25550550525 is an apocalyptic number.

25550550525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25550550525 is a deficient number, since it is larger than the sum of its proper divisors (16734527779).

25550550525 is a wasteful number, since it uses less digits than its factorization.

25550550525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334701 (or 334696 counting only the distinct ones).

The product of its (nonzero) digits is 312500, while the sum is 39.

The spelling of 25550550525 in words is "twenty-five billion, five hundred fifty million, five hundred fifty thousand, five hundred twenty-five".