25600563366 has 64 divisors (see below), whose sum is σ = 60255387648. Its totient is φ = 7098012288.

The previous prime is 25600563343. The next prime is 25600563367. The reversal of 25600563366 is 66336500652.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25600563367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573676 + ... + 616688.

It is an arithmetic number, because the mean of its divisors is an integer number (941490432).

Almost surely, 2^25600563366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25600563366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30127693824).

25600563366 is an abundant number, since it is smaller than the sum of its proper divisors (34654824282).

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

25600563366 is a wasteful number, since it uses less digits than its factorization.

25600563366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43445.

The product of its (nonzero) digits is 583200, while the sum is 42.

The spelling of 25600563366 in words is "twenty-five billion, six hundred million, five hundred sixty-three thousand, three hundred sixty-six".