25050505050 has 72 divisors (see below), whose sum is σ = 67393838304. Its totient is φ = 6671054880.

The previous prime is 25050505033. The next prime is 25050505093. The reversal of 25050505050 is 5050505052.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

25050505050 is a modest number, since divided by 505050 gives 25050 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 296889 + ... + 371811.

It is an arithmetic number, because the mean of its divisors is an integer number (936025532).

Almost surely, 2^25050505050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25050505050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33696919152).

25050505050 is an abundant number, since it is smaller than the sum of its proper divisors (42343333254).

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

25050505050 is a wasteful number, since it uses less digits than its factorization.

25050505050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75684 (or 75676 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 27.

The spelling of 25050505050 in words is "twenty-five billion, fifty million, five hundred five thousand, fifty".