25660047135456 has 192 divisors, whose sum is σ = 75802581066240. Its totient is φ = 8549194211712.

The previous prime is 25660047135433. The next prime is 25660047135469. The reversal of 25660047135456 is 65453174006652.

25660047135456 is a `hidden beast` number, since 2 + 56 + 6 + 0 + 0 + 4 + 7 + 135 + 456 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent 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, 145688661 + ... + 145864683.

It is an arithmetic number, because the mean of its divisors is an integer number (394805109720).

Almost surely, 2^{25660047135456} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25660047135456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37901290533120).

25660047135456 is an abundant number, since it is smaller than the sum of its proper divisors (50142533930784).

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

25660047135456 is an equidigital number, since it uses as much as digits as its factorization.

25660047135456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178137 (or 178111 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 54.

The spelling of 25660047135456 in words is "twenty-five trillion, six hundred sixty billion, forty-seven million, one hundred thirty-five thousand, four hundred fifty-six".