68183654489 has 2 divisors, whose sum is σ = 68183654490. Its totient is φ = 68183654488.

The previous prime is 68183654389. The next prime is 68183654653. The reversal of 68183654489 is 98445638186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66669822025 + 1513832464 = 258205^2 + 38908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68183654489 is a prime.

It is a super-2 number, since 2×68183654489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68183654389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34091827244 + 34091827245.

It is an arithmetic number, because the mean of its divisors is an integer number (34091827245).

Almost surely, 2^68183654489 is an apocalyptic number.

It is an amenable number.

68183654489 is a deficient number, since it is larger than the sum of its proper divisors (1).

68183654489 is an equidigital number, since it uses as much as digits as its factorization.

68183654489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39813120, while the sum is 62.

The spelling of 68183654489 in words is "sixty-eight billion, one hundred eighty-three million, six hundred fifty-four thousand, four hundred eighty-nine".