25303939668 has 108 divisors (see below), whose sum is σ = 74523994272. Its totient is φ = 7218197280.

The previous prime is 25303939649. The next prime is 25303939673. The reversal of 25303939668 is 86693930352.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1130223 + ... + 1152393.

It is an arithmetic number, because the mean of its divisors is an integer number (690036984).

Almost surely, 2^25303939668 is an apocalyptic number.

25303939668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25303939668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37261997136).

25303939668 is an abundant number, since it is smaller than the sum of its proper divisors (49220054604).

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

25303939668 is a wasteful number, since it uses less digits than its factorization.

25303939668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22842 (or 22830 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 54.

The spelling of 25303939668 in words is "twenty-five billion, three hundred three million, nine hundred thirty-nine thousand, six hundred sixty-eight".