25005502550 has 48 divisors (see below), whose sum is σ = 53189809920. Its totient is φ = 8567628960.

The previous prime is 25005502523. The next prime is 25005502579. The reversal of 25005502550 is 5520550052.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 522737 + ... + 568563.

It is an arithmetic number, because the mean of its divisors is an integer number (1108121040).

Almost surely, 2^25005502550 is an apocalyptic number.

25005502550 is an abundant number, since it is smaller than the sum of its proper divisors (28184307370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25005502550 is a wasteful number, since it uses less digits than its factorization.

25005502550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47405 (or 47400 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 29.

The spelling of 25005502550 in words is "twenty-five billion, five million, five hundred two thousand, five hundred fifty".