26921585899 has 16 divisors (see below), whose sum is σ = 29929328352. Its totient is φ = 24057911808.

The previous prime is 26921585891. The next prime is 26921586011. The reversal of 26921585899 is 99858512962.

It is a cyclic number.

It is not a de Polignac number, because 26921585899 - 2³ = 26921585891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26921585899.

It is not an unprimeable number, because it can be changed into a prime (26921585891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149932 + ... + 276265.

It is an arithmetic number, because the mean of its divisors is an integer number (1870583022).

Almost surely, 2^26921585899 is an apocalyptic number.

26921585899 is a deficient number, since it is larger than the sum of its proper divisors (3007742453).

26921585899 is a wasteful number, since it uses less digits than its factorization.

26921585899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426366.

The product of its digits is 27993600, while the sum is 64.

The spelling of 26921585899 in words is "twenty-six billion, nine hundred twenty-one million, five hundred eighty-five thousand, eight hundred ninety-nine".