25355726563 has 4 divisors (see below), whose sum is σ = 25447263760. Its totient is φ = 25264189368.

The previous prime is 25355726533. The next prime is 25355726567. The reversal of 25355726563 is 36562755352.

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 25355726563 - 2¹³ = 25355718371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25355726567) 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, 45768183 + ... + 45768736.

It is an arithmetic number, because the mean of its divisors is an integer number (6361815940).

Almost surely, 2^25355726563 is an apocalyptic number.

25355726563 is a deficient number, since it is larger than the sum of its proper divisors (91537197).

25355726563 is an equidigital number, since it uses as much as digits as its factorization.

25355726563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91537196.

The product of its digits is 5670000, while the sum is 49.

The spelling of 25355726563 in words is "twenty-five billion, three hundred fifty-five million, seven hundred twenty-six thousand, five hundred sixty-three".