68840681963 has 2 divisors, whose sum is σ = 68840681964. Its totient is φ = 68840681962.

The previous prime is 68840681947. The next prime is 68840681971. The reversal of 68840681963 is 36918604886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68840681963 - 2⁴ = 68840681947 is a prime.

It is not a weakly prime, because it can be changed into another prime (68840681863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34420340981 + 34420340982.

It is an arithmetic number, because the mean of its divisors is an integer number (34420340982).

Almost surely, 2^68840681963 is an apocalyptic number.

68840681963 is a deficient number, since it is larger than the sum of its proper divisors (1).

68840681963 is an equidigital number, since it uses as much as digits as its factorization.

68840681963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 68840681963 in words is "sixty-eight billion, eight hundred forty million, six hundred eighty-one thousand, nine hundred sixty-three".