68549153789 has 2 divisors, whose sum is σ = 68549153790. Its totient is φ = 68549153788.

The previous prime is 68549153741. The next prime is 68549153831. The reversal of 68549153789 is 98735194586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63626026564 + 4923127225 = 252242^2 + 70165^2 .

It is a cyclic number.

It is not a de Polignac number, because 68549153789 - 2¹² = 68549149693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68549153089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34274576894 + 34274576895.

It is an arithmetic number, because the mean of its divisors is an integer number (34274576895).

Almost surely, 2^68549153789 is an apocalyptic number.

It is an amenable number.

68549153789 is a deficient number, since it is larger than the sum of its proper divisors (1).

68549153789 is an equidigital number, since it uses as much as digits as its factorization.

68549153789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65318400, while the sum is 65.

The spelling of 68549153789 in words is "sixty-eight billion, five hundred forty-nine million, one hundred fifty-three thousand, seven hundred eighty-nine".