68556369481 has 2 divisors, whose sum is σ = 68556369482. Its totient is φ = 68556369480.

The previous prime is 68556369467. The next prime is 68556369509. The reversal of 68556369481 is 18496365586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53888979600 + 14667389881 = 232140^2 + 121109^2 .

It is a cyclic number.

It is not a de Polignac number, because 68556369481 - 2³³ = 59966434889 is a prime.

It is a super-2 number, since 2×68556369481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68556369451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34278184740 + 34278184741.

It is an arithmetic number, because the mean of its divisors is an integer number (34278184741).

Almost surely, 2^68556369481 is an apocalyptic number.

It is an amenable number.

68556369481 is a deficient number, since it is larger than the sum of its proper divisors (1).

68556369481 is an equidigital number, since it uses as much as digits as its factorization.

68556369481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37324800, while the sum is 61.

The spelling of 68556369481 in words is "sixty-eight billion, five hundred fifty-six million, three hundred sixty-nine thousand, four hundred eighty-one".