25900863535 has 4 divisors (see below), whose sum is σ = 31081036248. Its totient is φ = 20720690824.

The previous prime is 25900863529. The next prime is 25900863557. The reversal of 25900863535 is 53536800952.

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 25900863535 - 2¹⁹ = 25900339247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2590086349 + ... + 2590086358.

It is an arithmetic number, because the mean of its divisors is an integer number (7770259062).

Almost surely, 2^25900863535 is an apocalyptic number.

25900863535 is a deficient number, since it is larger than the sum of its proper divisors (5180172713).

25900863535 is an equidigital number, since it uses as much as digits as its factorization.

25900863535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180172712.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 25900863535 in words is "twenty-five billion, nine hundred million, eight hundred sixty-three thousand, five hundred thirty-five".