26390055805 has 16 divisors (see below), whose sum is σ = 31961180160. Its totient is φ = 20917092672.

The previous prime is 26390055799. The next prime is 26390055851. The reversal of 26390055805 is 50855009362.

It is a cyclic number.

It is not a de Polignac number, because 26390055805 - 2⁵ = 26390055773 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 441147 + ... + 497383.

It is an arithmetic number, because the mean of its divisors is an integer number (1997573760).

Almost surely, 2^26390055805 is an apocalyptic number.

It is an amenable number.

26390055805 is a deficient number, since it is larger than the sum of its proper divisors (5571124355).

26390055805 is a wasteful number, since it uses less digits than its factorization.

26390055805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57108.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 26390055805 in words is "twenty-six billion, three hundred ninety million, fifty-five thousand, eight hundred five".