25669076640 has 192 divisors, whose sum is σ = 83152645632. Its totient is φ = 6652108800.

The previous prime is 25669076639. The next prime is 25669076669. The reversal of 25669076640 is 4667096652.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5330874 + ... + 5335686.

It is an arithmetic number, because the mean of its divisors is an integer number (433086696).

Almost surely, 2^25669076640 is an apocalyptic number.

25669076640 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 25669076640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41576322816).

25669076640 is an abundant number, since it is smaller than the sum of its proper divisors (57483568992).

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

25669076640 is a wasteful number, since it uses less digits than its factorization.

25669076640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143 (or 5135 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 25669076640 in words is "twenty-five billion, six hundred sixty-nine million, seventy-six thousand, six hundred forty".