68460465109 has 2 divisors, whose sum is σ = 68460465110. Its totient is φ = 68460465108.

The previous prime is 68460465091. The next prime is 68460465137. The reversal of 68460465109 is 90156406486.

Together with previous prime (68460465091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59941728900 + 8518736209 = 244830^2 + 92297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68460465109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68460465209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34230232554 + 34230232555.

It is an arithmetic number, because the mean of its divisors is an integer number (34230232555).

Almost surely, 2^68460465109 is an apocalyptic number.

It is an amenable number.

68460465109 is a deficient number, since it is larger than the sum of its proper divisors (1).

68460465109 is an equidigital number, since it uses as much as digits as its factorization.

68460465109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 68460465109 in words is "sixty-eight billion, four hundred sixty million, four hundred sixty-five thousand, one hundred nine".