140664345161 has 2 divisors, whose sum is σ = 140664345162. Its totient is φ = 140664345160.

The previous prime is 140664345121. The next prime is 140664345179. The reversal of 140664345161 is 161543466041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140208309136 + 456036025 = 374444^2 + 21355^2 .

It is an emirp because it is prime and its reverse (161543466041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140664345161 is a prime.

It is not a weakly prime, because it can be changed into another prime (140664345121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70332172580 + 70332172581.

It is an arithmetic number, because the mean of its divisors is an integer number (70332172581).

Almost surely, 2^140664345161 is an apocalyptic number.

It is an amenable number.

140664345161 is a deficient number, since it is larger than the sum of its proper divisors (1).

140664345161 is an equidigital number, since it uses as much as digits as its factorization.

140664345161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 140664345161 in words is "one hundred forty billion, six hundred sixty-four million, three hundred forty-five thousand, one hundred sixty-one".