26873163206389 has 2 divisors, whose sum is σ = 26873163206390. Its totient is φ = 26873163206388.

The previous prime is 26873163206387. The next prime is 26873163206399. The reversal of 26873163206389 is 98360236137862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23683474365489 + 3189688840900 = 4866567^2 + 1785970^2 .

It is a cyclic number.

It is not a de Polignac number, because 26873163206389 - 2¹ = 26873163206387 is a prime.

Together with 26873163206387, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 26873163206389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26873163206387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13436581603194 + 13436581603195.

It is an arithmetic number, because the mean of its divisors is an integer number (13436581603195).

Almost surely, 2^{26873163206389} is an apocalyptic number.

It is an amenable number.

26873163206389 is a deficient number, since it is larger than the sum of its proper divisors (1).

26873163206389 is an equidigital number, since it uses as much as digits as its factorization.

26873163206389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94058496, while the sum is 64.

The spelling of 26873163206389 in words is "twenty-six trillion, eight hundred seventy-three billion, one hundred sixty-three million, two hundred six thousand, three hundred eighty-nine".