263745866687 has 2 divisors, whose sum is σ = 263745866688. Its totient is φ = 263745866686.

The previous prime is 263745866663. The next prime is 263745866723. The reversal of 263745866687 is 786668547362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263745866687 - 2⁶ = 263745866623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263745866647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131872933343 + 131872933344.

It is an arithmetic number, because the mean of its divisors is an integer number (131872933344).

Almost surely, 2^263745866687 is an apocalyptic number.

263745866687 is a deficient number, since it is larger than the sum of its proper divisors (1).

263745866687 is an equidigital number, since it uses as much as digits as its factorization.

263745866687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 487710720, while the sum is 68.

The spelling of 263745866687 in words is "two hundred sixty-three billion, seven hundred forty-five million, eight hundred sixty-six thousand, six hundred eighty-seven".