26264406643 has 2 divisors, whose sum is σ = 26264406644. Its totient is φ = 26264406642.

The previous prime is 26264406569. The next prime is 26264406653. The reversal of 26264406643 is 34660446262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26264406643 - 2¹³ = 26264398451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26264406643.

It is not a weakly prime, because it can be changed into another prime (26264406653) 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, 13132203321 + 13132203322.

It is an arithmetic number, because the mean of its divisors is an integer number (13132203322).

Almost surely, 2^26264406643 is an apocalyptic number.

26264406643 is a deficient number, since it is larger than the sum of its proper divisors (1).

26264406643 is an equidigital number, since it uses as much as digits as its factorization.

26264406643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 43.

The spelling of 26264406643 in words is "twenty-six billion, two hundred sixty-four million, four hundred six thousand, six hundred forty-three".