26894336641 has 2 divisors, whose sum is σ = 26894336642. Its totient is φ = 26894336640.

The previous prime is 26894336591. The next prime is 26894336653. The reversal of 26894336641 is 14663349862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14329047616 + 12565289025 = 119704^2 + 112095^2 .

It is a cyclic number.

It is not a de Polignac number, because 26894336641 - 2¹⁹ = 26893812353 is a prime.

It is not a weakly prime, because it can be changed into another prime (26894336041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13447168320 + 13447168321.

It is an arithmetic number, because the mean of its divisors is an integer number (13447168321).

Almost surely, 2^26894336641 is an apocalyptic number.

It is an amenable number.

26894336641 is a deficient number, since it is larger than the sum of its proper divisors (1).

26894336641 is an equidigital number, since it uses as much as digits as its factorization.

26894336641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 52.

The spelling of 26894336641 in words is "twenty-six billion, eight hundred ninety-four million, three hundred thirty-six thousand, six hundred forty-one".