25544012250 has 64 divisors (see below), whose sum is σ = 64126722816. Its totient is φ = 6772328000.

The previous prime is 25544012213. The next prime is 25544012251. The reversal of 25544012250 is 5221044552.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25544012251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31315 + ... + 228185.

It is an arithmetic number, because the mean of its divisors is an integer number (1001980044).

Almost surely, 2^25544012250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25544012250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32063361408).

25544012250 is an abundant number, since it is smaller than the sum of its proper divisors (38582710566).

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

25544012250 is a wasteful number, since it uses less digits than its factorization.

25544012250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197064 (or 197054 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The spelling of 25544012250 in words is "twenty-five billion, five hundred forty-four million, twelve thousand, two hundred fifty".