25263018606 has 128 divisors (see below), whose sum is σ = 62460288000. Its totient is φ = 6647961600.

The previous prime is 25263018601. The next prime is 25263018607. The reversal of 25263018606 is 60681036252.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25263018601) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9188520 + ... + 9191268.

It is an arithmetic number, because the mean of its divisors is an integer number (487971000).

Almost surely, 2^25263018606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25263018606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31230144000).

25263018606 is an abundant number, since it is smaller than the sum of its proper divisors (37197269394).

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

25263018606 is a wasteful number, since it uses less digits than its factorization.

25263018606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 25263018606 in words is "twenty-five billion, two hundred sixty-three million, eighteen thousand, six hundred six".