26391666052051 has 2 divisors, whose sum is σ = 26391666052052. Its totient is φ = 26391666052050.

The previous prime is 26391666052013. The next prime is 26391666052099. The reversal of 26391666052051 is 15025066619362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26391666052051 - 2⁹ = 26391666051539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26391666052051.

It is not a weakly prime, because it can be changed into another prime (26391666052151) 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, 13195833026025 + 13195833026026.

It is an arithmetic number, because the mean of its divisors is an integer number (13195833026026).

Almost surely, 2^{26391666052051} is an apocalyptic number.

26391666052051 is a deficient number, since it is larger than the sum of its proper divisors (1).

26391666052051 is an equidigital number, since it uses as much as digits as its factorization.

26391666052051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 26391666052051 in words is "twenty-six trillion, three hundred ninety-one billion, six hundred sixty-six million, fifty-two thousand, fifty-one".