26685387783808 has 64 divisors (see below), whose sum is σ = 59098532613120. Its totient is φ = 11919031741440.

The previous prime is 26685387783781. The next prime is 26685387783823. The reversal of 26685387783808 is 80838778358662.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 258607960 + ... + 258711127.

It is an arithmetic number, because the mean of its divisors is an integer number (923414572080).

Almost surely, 2^{26685387783808} is an apocalyptic number.

It is an amenable number.

26685387783808 is an abundant number, since it is smaller than the sum of its proper divisors (32413144829312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26685387783808 is a wasteful number, since it uses less digits than its factorization.

26685387783808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517319145 (or 517319133 counting only the distinct ones).

The product of its (nonzero) digits is 5202247680, while the sum is 79.

The spelling of 26685387783808 in words is "twenty-six trillion, six hundred eighty-five billion, three hundred eighty-seven million, seven hundred eighty-three thousand, eight hundred eight".