26620864422640 has 40 divisors (see below), whose sum is σ = 64027768746240. Its totient is φ = 10281161431296.

The previous prime is 26620864422619. The next prime is 26620864422721. The reversal of 26620864422640 is 4622446802662.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5737252944 + ... + 5737257583.

It is an arithmetic number, because the mean of its divisors is an integer number (1600694218656).

Almost surely, 2^{26620864422640} is an apocalyptic number.

26620864422640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26620864422640 is an abundant number, since it is smaller than the sum of its proper divisors (37406904323600).

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

26620864422640 is a wasteful number, since it uses less digits than its factorization.

26620864422640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11474510569 (or 11474510563 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 52.

The spelling of 26620864422640 in words is "twenty-six trillion, six hundred twenty billion, eight hundred sixty-four million, four hundred twenty-two thousand, six hundred forty".