25506116202 has 128 divisors (see below), whose sum is σ = 62947196928. Its totient is φ = 6729624000.

The previous prime is 25506116197. The next prime is 25506116203. The reversal of 25506116202 is 20261160552.

It is a self number, because there is not a number n which added to its sum of digits gives 25506116202.

It is not an unprimeable number, because it can be changed into a prime (25506116203) 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, 17577577 + ... + 17579027.

It is an arithmetic number, because the mean of its divisors is an integer number (491774976).

Almost surely, 2^25506116202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25506116202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31473598464).

25506116202 is an abundant number, since it is smaller than the sum of its proper divisors (37441080726).

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

25506116202 is a wasteful number, since it uses less digits than its factorization.

25506116202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 25506116202 its reverse (20261160552), we get a palindrome (45767276754).

The spelling of 25506116202 in words is "twenty-five billion, five hundred six million, one hundred sixteen thousand, two hundred two".