25668312563 has 8 divisors (see below), whose sum is σ = 27458402832. Its totient is φ = 23909354496.

The previous prime is 25668312521. The next prime is 25668312569. The reversal of 25668312563 is 36521386652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25668312563 - 2¹⁴ = 25668296179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25668312569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7781345 + ... + 7784642.

It is an arithmetic number, because the mean of its divisors is an integer number (3432300354).

Almost surely, 2^25668312563 is an apocalyptic number.

25668312563 is a deficient number, since it is larger than the sum of its proper divisors (1790090269).

25668312563 is a wasteful number, since it uses less digits than its factorization.

25668312563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15566101.

The product of its digits is 1555200, while the sum is 47.

The spelling of 25668312563 in words is "twenty-five billion, six hundred sixty-eight million, three hundred twelve thousand, five hundred sixty-three".