26568146849 has 2 divisors, whose sum is σ = 26568146850. Its totient is φ = 26568146848.

The previous prime is 26568146831. The next prime is 26568146863. The reversal of 26568146849 is 94864186562.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26525008225 + 43138624 = 162865^2 + 6568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26568146849 is a prime.

It is not a weakly prime, because it can be changed into another prime (26568146879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13284073424 + 13284073425.

It is an arithmetic number, because the mean of its divisors is an integer number (13284073425).

Almost surely, 2^26568146849 is an apocalyptic number.

It is an amenable number.

26568146849 is a deficient number, since it is larger than the sum of its proper divisors (1).

26568146849 is an equidigital number, since it uses as much as digits as its factorization.

26568146849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 59.

The spelling of 26568146849 in words is "twenty-six billion, five hundred sixty-eight million, one hundred forty-six thousand, eight hundred forty-nine".