26561425166664 has 64 divisors (see below), whose sum is σ = 67396319827200. Its totient is φ = 8721447307584.

The previous prime is 26561425166659. The next prime is 26561425166699. The reversal of 26561425166664 is 46666152416562.

It is a junction number, because it is equal to n+sod(n) for n = 26561425166598 and 26561425166607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73432219 + ... + 73793045.

It is an arithmetic number, because the mean of its divisors is an integer number (1053067497300).

Almost surely, 2^{26561425166664} is an apocalyptic number.

26561425166664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

26561425166664 is an abundant number, since it is smaller than the sum of its proper divisors (40834894660536).

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

26561425166664 is a wasteful number, since it uses less digits than its factorization.

26561425166664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406682 (or 406678 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 60.

The spelling of 26561425166664 in words is "twenty-six trillion, five hundred sixty-one billion, four hundred twenty-five million, one hundred sixty-six thousand, six hundred sixty-four".