25997662080 has 576 divisors, whose sum is σ = 102993761520. Its totient is φ = 6019153920.

The previous prime is 25997662043. The next prime is 25997662081. The reversal of 25997662080 is 8026679952.

25997662080 is a `hidden beast` number, since 2 + 5 + 9 + 9 + 7 + 6 + 620 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25997662081) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16547695 + ... + 16549265.

Almost surely, 2^25997662080 is an apocalyptic number.

25997662080 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 25997662080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51496880760).

25997662080 is an abundant number, since it is smaller than the sum of its proper divisors (76996099440).

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

25997662080 is a wasteful number, since it uses less digits than its factorization.

25997662080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1611 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 25997662080 in words is "twenty-five billion, nine hundred ninety-seven million, six hundred sixty-two thousand, eighty".