25685130204 has 144 divisors (see below), whose sum is σ = 70356843648. Its totient is φ = 7869947904.

The previous prime is 25685130203. The next prime is 25685130209. The reversal of 25685130204 is 40203158652.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25685130203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26951392 + ... + 26952344.

It is an arithmetic number, because the mean of its divisors is an integer number (488589192).

Almost surely, 2^25685130204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25685130204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35178421824).

25685130204 is an abundant number, since it is smaller than the sum of its proper divisors (44671713444).

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

25685130204 is a wasteful number, since it uses less digits than its factorization.

25685130204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964 (or 1959 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 25685130204 its reverse (40203158652), we get a palindrome (65888288856).

The spelling of 25685130204 in words is "twenty-five billion, six hundred eighty-five million, one hundred thirty thousand, two hundred four".