25669429720 has 256 divisors, whose sum is σ = 66886041600. Its totient is φ = 8780736000.

The previous prime is 25669429717. The next prime is 25669429733. The reversal of 25669429720 is 2792496652.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct 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 (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134394825 + ... + 134395015.

It is an arithmetic number, because the mean of its divisors is an integer number (261273600).

Almost surely, 2^25669429720 is an apocalyptic number.

25669429720 is a gapful number since it is divisible by the number (20) 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 25669429720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33443020800).

25669429720 is an abundant number, since it is smaller than the sum of its proper divisors (41216611880).

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

25669429720 is a wasteful number, since it uses less digits than its factorization.

25669429720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 25669429720 in words is "twenty-five billion, six hundred sixty-nine million, four hundred twenty-nine thousand, seven hundred twenty".