25669037880 has 384 divisors, whose sum is σ = 88123576320. Its totient is φ = 6472120320.

The previous prime is 25669037879. The next prime is 25669037899. The reversal of 25669037880 is 8873096652.

It is a happy number.

25669037880 is a `hidden beast` number, since 2 + 566 + 9 + 0 + 3 + 78 + 8 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 157478679 + ... + 157478841.

It is an arithmetic number, because the mean of its divisors is an integer number (229488480).

Almost surely, 2^25669037880 is an apocalyptic number.

25669037880 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 25669037880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44061788160).

25669037880 is an abundant number, since it is smaller than the sum of its proper divisors (62454538440).

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

25669037880 is a wasteful number, since it uses less digits than its factorization.

25669037880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 25669037880 in words is "twenty-five billion, six hundred sixty-nine million, thirty-seven thousand, eight hundred eighty".