25605343316 has 24 divisors (see below), whose sum is σ = 51601615296. Its totient is φ = 10889948160.

The previous prime is 25605343279. The next prime is 25605343319. The reversal of 25605343316 is 61334350652.

It is a self number, because there is not a number n which added to its sum of digits gives 25605343316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25605343319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3486701 + ... + 3494036.

It is an arithmetic number, because the mean of its divisors is an integer number (2150067304).

Almost surely, 2^25605343316 is an apocalyptic number.

It is an amenable number.

25605343316 is an abundant number, since it is smaller than the sum of its proper divisors (25996271980).

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

25605343316 is a wasteful number, since it uses less digits than its factorization.

25605343316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6980879 (or 6980877 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 25605343316 its reverse (61334350652), we get a palindrome (86939693968).

The spelling of 25605343316 in words is "twenty-five billion, six hundred five million, three hundred forty-three thousand, three hundred sixteen".