25530055550 has 24 divisors (see below), whose sum is σ = 47929706856. Its totient is φ = 10116580640.

The previous prime is 25530055531. The next prime is 25530055559. The reversal of 25530055550 is 5555003552.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25530055550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530055559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2380637 + ... + 2391336.

It is an arithmetic number, because the mean of its divisors is an integer number (1997071119).

Almost surely, 2^25530055550 is an apocalyptic number.

25530055550 is a deficient number, since it is larger than the sum of its proper divisors (22399651306).

25530055550 is a wasteful number, since it uses less digits than its factorization.

25530055550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772092 (or 4772087 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 35.

The spelling of 25530055550 in words is "twenty-five billion, five hundred thirty million, fifty-five thousand, five hundred fifty".