25388765250 has 64 divisors (see below), whose sum is σ = 63469516032. Its totient is φ = 6759744000.

The previous prime is 25388765239. The next prime is 25388765273. The reversal of 25388765250 is 5256788352.

It is a junction number, because it is equal to n+sod(n) for n = 25388765193 and 25388765202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459090 + ... + 511410.

It is an arithmetic number, because the mean of its divisors is an integer number (991711188).

Almost surely, 2^25388765250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25388765250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31734758016).

25388765250 is an abundant number, since it is smaller than the sum of its proper divisors (38080750782).

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

25388765250 is a wasteful number, since it uses less digits than its factorization.

25388765250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52988 (or 52978 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 51.

The spelling of 25388765250 in words is "twenty-five billion, three hundred eighty-eight million, seven hundred sixty-five thousand, two hundred fifty".