68551727528549 has 2 divisors, whose sum is σ = 68551727528550. Its totient is φ = 68551727528548.

The previous prime is 68551727528521. The next prime is 68551727528567. The reversal of 68551727528549 is 94582572715586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57559306636225 + 10992420892324 = 7586785^2 + 3315482^2 .

It is a cyclic number.

It is not a de Polignac number, because 68551727528549 - 2¹⁶ = 68551727463013 is a prime.

It is a super-2 number, since 2×68551727528549² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68551727521549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34275863764274 + 34275863764275.

It is an arithmetic number, because the mean of its divisors is an integer number (34275863764275).

Almost surely, 2^{68551727528549} is an apocalyptic number.

It is an amenable number.

68551727528549 is a deficient number, since it is larger than the sum of its proper divisors (1).

68551727528549 is an equidigital number, since it uses as much as digits as its factorization.

68551727528549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440000, while the sum is 74.

The spelling of 68551727528549 in words is "sixty-eight trillion, five hundred fifty-one billion, seven hundred twenty-seven million, five hundred twenty-eight thousand, five hundred forty-nine".