68722589669 has 2 divisors, whose sum is σ = 68722589670. Its totient is φ = 68722589668.

The previous prime is 68722589653. The next prime is 68722589713. The reversal of 68722589669 is 96698522786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44115961444 + 24606628225 = 210038^2 + 156865^2 .

It is a cyclic number.

It is not a de Polignac number, because 68722589669 - 2⁴ = 68722589653 is a prime.

It is a super-2 number, since 2×68722589669² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68722589599 and 68722589608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68722529669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34361294834 + 34361294835.

It is an arithmetic number, because the mean of its divisors is an integer number (34361294835).

Almost surely, 2^68722589669 is an apocalyptic number.

It is an amenable number.

68722589669 is a deficient number, since it is larger than the sum of its proper divisors (1).

68722589669 is an equidigital number, since it uses as much as digits as its factorization.

68722589669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156764160, while the sum is 68.

The spelling of 68722589669 in words is "sixty-eight billion, seven hundred twenty-two million, five hundred eighty-nine thousand, six hundred sixty-nine".