25397469578880 has 512 divisors, whose sum is σ = 103240594828800. Its totient is φ = 5780214743040.

The previous prime is 25397469578879. The next prime is 25397469578981. The reversal of 25397469578880 is 8887596479352.

25397469578880 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 7 + 469 + 5 + 78 + 8 + 80 = 666.

It is a super-2 number, since 2×25397469578880² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25397469578880.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27733110 + ... + 28634250.

It is an arithmetic number, because the mean of its divisors is an integer number (201641786775).

Almost surely, 2^{25397469578880} is an apocalyptic number.

25397469578880 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 25397469578880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51620297414400).

25397469578880 is an abundant number, since it is smaller than the sum of its proper divisors (77843125249920).

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

25397469578880 is a wasteful number, since it uses less digits than its factorization.

25397469578880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901409 (or 901391 counting only the distinct ones).

The product of its (nonzero) digits is 7315660800, while the sum is 81.

The spelling of 25397469578880 in words is "twenty-five trillion, three hundred ninety-seven billion, four hundred sixty-nine million, five hundred seventy-eight thousand, eight hundred eighty".