25443245550 has 96 divisors (see below), whose sum is σ = 65535091200. Its totient is φ = 6527848960.

The previous prime is 25443245549. The next prime is 25443245579. The reversal of 25443245550 is 5554234452.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25443245499 and 25443245508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 385366 + ... + 446534.

It is an arithmetic number, because the mean of its divisors is an integer number (682657200).

Almost surely, 2^25443245550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25443245550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32767545600).

25443245550 is an abundant number, since it is smaller than the sum of its proper divisors (40091845650).

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

25443245550 is a wasteful number, since it uses less digits than its factorization.

25443245550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61290 (or 61285 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 39.

The spelling of 25443245550 in words is "twenty-five billion, four hundred forty-three million, two hundred forty-five thousand, five hundred fifty".