25563479359 has 4 divisors (see below), whose sum is σ = 27887432040. Its totient is φ = 23239526680.

The previous prime is 25563479351. The next prime is 25563479393. The reversal of 25563479359 is 95397436552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25563479359 - 2³ = 25563479351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25563479351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1161976324 + ... + 1161976345.

It is an arithmetic number, because the mean of its divisors is an integer number (6971858010).

Almost surely, 2^25563479359 is an apocalyptic number.

25563479359 is a deficient number, since it is larger than the sum of its proper divisors (2323952681).

25563479359 is a wasteful number, since it uses less digits than its factorization.

25563479359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323952680.

The product of its digits is 30618000, while the sum is 58.

The spelling of 25563479359 in words is "twenty-five billion, five hundred sixty-three million, four hundred seventy-nine thousand, three hundred fifty-nine".