26563250561 has 8 divisors (see below), whose sum is σ = 27982509600. Its totient is φ = 25146110880.

The previous prime is 26563250557. The next prime is 26563250563. The reversal of 26563250561 is 16505236562.

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

It is not a de Polignac number, because 26563250561 - 2² = 26563250557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26563250563) 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, 504071 + ... + 554268.

It is an arithmetic number, because the mean of its divisors is an integer number (3497813700).

Almost surely, 2^26563250561 is an apocalyptic number.

It is an amenable number.

26563250561 is a deficient number, since it is larger than the sum of its proper divisors (1419259039).

26563250561 is a wasteful number, since it uses less digits than its factorization.

26563250561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059679.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 26563250561 in words is "twenty-six billion, five hundred sixty-three million, two hundred fifty thousand, five hundred sixty-one".