25206065280 has 768 divisors, whose sum is σ = 100726778880. Its totient is φ = 5750784000.

The previous prime is 25206065273. The next prime is 25206065293. The reversal of 25206065280 is 8256060252.

25206065280 is a `hidden beast` number, since 2 + 5 + 20 + 606 + 5 + 28 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 80530404 + ... + 80530716.

It is an arithmetic number, because the mean of its divisors is an integer number (131154660).

Almost surely, 2^25206065280 is an apocalyptic number.

25206065280 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 25206065280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50363389440).

25206065280 is an abundant number, since it is smaller than the sum of its proper divisors (75520713600).

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

25206065280 is a wasteful number, since it uses less digits than its factorization.

25206065280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 25206065280 in words is "twenty-five billion, two hundred six million, sixty-five thousand, two hundred eighty".