26064660405321 has 72 divisors (see below), whose sum is σ = 40729424804640. Its totient is φ = 16051139822592.

The previous prime is 26064660405319. The next prime is 26064660405353. The reversal of 26064660405321 is 12350406646062.

It is a happy number.

26064660405321 is a `hidden beast` number, since 2 + 6 + 0 + 6 + 4 + 6 + 604 + 0 + 5 + 32 + 1 = 666.

It is not a de Polignac number, because 26064660405321 - 2¹ = 26064660405319 is a prime.

It is a super-2 number, since 2×26064660405321² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26064660405221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 80449270 + ... + 80772608.

It is an arithmetic number, because the mean of its divisors is an integer number (565686455620).

Almost surely, 2^{26064660405321} is an apocalyptic number.

It is an amenable number.

26064660405321 is a deficient number, since it is larger than the sum of its proper divisors (14664764399319).

26064660405321 is a wasteful number, since it uses less digits than its factorization.

26064660405321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324003 (or 323981 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 26064660405321 in words is "twenty-six trillion, sixty-four billion, six hundred sixty million, four hundred five thousand, three hundred twenty-one".