68720555297 has 2 divisors, whose sum is σ = 68720555298. Its totient is φ = 68720555296.

The previous prime is 68720555287. The next prime is 68720555311. The reversal of 68720555297 is 79255502786.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47554961041 + 21165594256 = 218071^2 + 145484^2 .

It is a cyclic number.

It is not a de Polignac number, because 68720555297 - 2¹² = 68720551201 is a prime.

It is not a weakly prime, because it can be changed into another prime (68720555227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34360277648 + 34360277649.

It is an arithmetic number, because the mean of its divisors is an integer number (34360277649).

Almost surely, 2^68720555297 is an apocalyptic number.

It is an amenable number.

68720555297 is a deficient number, since it is larger than the sum of its proper divisors (1).

68720555297 is an equidigital number, since it uses as much as digits as its factorization.

68720555297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 68720555297 in words is "sixty-eight billion, seven hundred twenty million, five hundred fifty-five thousand, two hundred ninety-seven".