25852139250 has 128 divisors (see below), whose sum is σ = 73817602560. Its totient is φ = 5903251200.

The previous prime is 25852139249. The next prime is 25852139293. The reversal of 25852139250 is 5293125852.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7626556 + ... + 7629944.

It is an arithmetic number, because the mean of its divisors is an integer number (576700020).

Almost surely, 2^25852139250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25852139250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36908801280).

25852139250 is an abundant number, since it is smaller than the sum of its proper divisors (47965463310).

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

25852139250 is a wasteful number, since it uses less digits than its factorization.

25852139250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869 (or 4859 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 25852139250 in words is "twenty-five billion, eight hundred fifty-two million, one hundred thirty-nine thousand, two hundred fifty".