26640550552664 has 16 divisors (see below), whose sum is σ = 49951686294720. Its totient is φ = 13320100874080.

The previous prime is 26640550552639. The next prime is 26640550552667. The reversal of 26640550552664 is 46625505504662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640550552667) 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, 21149939 + ... + 22374114.

It is an arithmetic number, because the mean of its divisors is an integer number (3121980393420).

Almost surely, 2^{26640550552664} is an apocalyptic number.

It is an amenable number.

26640550552664 is a deficient number, since it is larger than the sum of its proper divisors (23311135742056).

26640550552664 is a wasteful number, since it uses less digits than its factorization.

26640550552664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43600570 (or 43600566 counting only the distinct ones).

The product of its (nonzero) digits is 51840000, while the sum is 56.

The spelling of 26640550552664 in words is "twenty-six trillion, six hundred forty billion, five hundred fifty million, five hundred fifty-two thousand, six hundred sixty-four".