68726633662769 has 2 divisors, whose sum is σ = 68726633662770. Its totient is φ = 68726633662768.

The previous prime is 68726633662747. The next prime is 68726633662787. The reversal of 68726633662769 is 96726633662786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68255025955600 + 471607707169 = 8261660^2 + 686737^2 .

It is a cyclic number.

It is not a de Polignac number, because 68726633662769 - 2²⁰ = 68726632614193 is a prime.

It is a super-2 number, since 2×68726633662769² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68726633662769.

It is not a weakly prime, because it can be changed into another prime (68726633682769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34363316831384 + 34363316831385.

It is an arithmetic number, because the mean of its divisors is an integer number (34363316831385).

Almost surely, 2^{68726633662769} is an apocalyptic number.

It is an amenable number.

68726633662769 is a deficient number, since it is larger than the sum of its proper divisors (1).

68726633662769 is an equidigital number, since it uses as much as digits as its factorization.

68726633662769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5925685248, while the sum is 77.

The spelling of 68726633662769 in words is "sixty-eight trillion, seven hundred twenty-six billion, six hundred thirty-three million, six hundred sixty-two thousand, seven hundred sixty-nine".