26643642022687 has 2 divisors, whose sum is σ = 26643642022688. Its totient is φ = 26643642022686.

The previous prime is 26643642022559. The next prime is 26643642022709. The reversal of 26643642022687 is 78622024634662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26643642022687 - 2⁷ = 26643642022559 is a prime.

It is a super-2 number, since 2×26643642022687² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26643642122687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13321821011343 + 13321821011344.

It is an arithmetic number, because the mean of its divisors is an integer number (13321821011344).

Almost surely, 2^{26643642022687} is an apocalyptic number.

26643642022687 is a deficient number, since it is larger than the sum of its proper divisors (1).

26643642022687 is an equidigital number, since it uses as much as digits as its factorization.

26643642022687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55738368, while the sum is 58.

The spelling of 26643642022687 in words is "twenty-six trillion, six hundred forty-three billion, six hundred forty-two million, twenty-two thousand, six hundred eighty-seven".