26104890866 has 8 divisors (see below), whose sum is σ = 39545033004. Its totient is φ = 12923213200.

The previous prime is 26104890857. The next prime is 26104890869. The reversal of 26104890866 is 66809840162.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25203150025 + 901740841 = 158755^2 + 30029^2 .

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

It is not an unprimeable number, because it can be changed into a prime (26104890869) 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, 64615865 + ... + 64616268.

Almost surely, 2^26104890866 is an apocalyptic number.

26104890866 is a deficient number, since it is larger than the sum of its proper divisors (13440142138).

26104890866 is a wasteful number, since it uses less digits than its factorization.

26104890866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129232236.

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 26104890866 in words is "twenty-six billion, one hundred four million, eight hundred ninety thousand, eight hundred sixty-six".