26867546685457 has 2 divisors, whose sum is σ = 26867546685458. Its totient is φ = 26867546685456.

The previous prime is 26867546685433. The next prime is 26867546685487. The reversal of 26867546685457 is 75458664576862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14915978618641 + 11951568066816 = 3862121^2 + 3457104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26867546685457 is a prime.

It is a super-2 number, since 2×26867546685457² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26867546685487) 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, 13433773342728 + 13433773342729.

It is an arithmetic number, because the mean of its divisors is an integer number (13433773342729).

Almost surely, 2^{26867546685457} is an apocalyptic number.

It is an amenable number.

26867546685457 is a deficient number, since it is larger than the sum of its proper divisors (1).

26867546685457 is an equidigital number, since it uses as much as digits as its factorization.

26867546685457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16257024000, while the sum is 79.

The spelling of 26867546685457 in words is "twenty-six trillion, eight hundred sixty-seven billion, five hundred forty-six million, six hundred eighty-five thousand, four hundred fifty-seven".