26681633347 has 2 divisors, whose sum is σ = 26681633348. Its totient is φ = 26681633346.

The previous prime is 26681633273. The next prime is 26681633357. The reversal of 26681633347 is 74333618662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26681633347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26681633347.

It is not a weakly prime, because it can be changed into another prime (26681633357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13340816673 + 13340816674.

It is an arithmetic number, because the mean of its divisors is an integer number (13340816674).

Almost surely, 2^26681633347 is an apocalyptic number.

26681633347 is a deficient number, since it is larger than the sum of its proper divisors (1).

26681633347 is an equidigital number, since it uses as much as digits as its factorization.

26681633347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 49.

The spelling of 26681633347 in words is "twenty-six billion, six hundred eighty-one million, six hundred thirty-three thousand, three hundred forty-seven".