26650440013 has 2 divisors, whose sum is σ = 26650440014. Its totient is φ = 26650440012.

The previous prime is 26650439993. The next prime is 26650440017. The reversal of 26650440013 is 31004405662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15193520644 + 11456919369 = 123262^2 + 107037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26650440013 is a prime.

It is a super-2 number, since 2×26650440013² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26650440017) by changing a digit.

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 as a sum of consecutive naturals, namely, 13325220006 + 13325220007.

It is an arithmetic number, because the mean of its divisors is an integer number (13325220007).

Almost surely, 2^26650440013 is an apocalyptic number.

It is an amenable number.

26650440013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26650440013 is an equidigital number, since it uses as much as digits as its factorization.

26650440013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 26650440013 its reverse (31004405662), we get a palindrome (57654845675).

The spelling of 26650440013 in words is "twenty-six billion, six hundred fifty million, four hundred forty thousand, thirteen".