25803394961 has 8 divisors (see below), whose sum is σ = 27895562880. Its totient is φ = 23784636528.

The previous prime is 25803394913. The next prime is 25803394973. The reversal of 25803394961 is 16949330852.

It is a happy number.

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 25803394961 - 2¹⁰ = 25803393937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25803394361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18351641 + ... + 18353046.

It is an arithmetic number, because the mean of its divisors is an integer number (3486945360).

Almost surely, 2^25803394961 is an apocalyptic number.

It is an amenable number.

25803394961 is a deficient number, since it is larger than the sum of its proper divisors (2092167919).

25803394961 is a wasteful number, since it uses less digits than its factorization.

25803394961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36704743.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 25803394961 in words is "twenty-five billion, eight hundred three million, three hundred ninety-four thousand, nine hundred sixty-one".