163540064403601 has 2 divisors, whose sum is σ = 163540064403602. Its totient is φ = 163540064403600.

The previous prime is 163540064403311. The next prime is 163540064403649. The reversal of 163540064403601 is 106304460045361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161432779584400 + 2107284819201 = 12705620^2 + 1451649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163540064403601 is a prime.

It is not a weakly prime, because it can be changed into another prime (163540064406601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81770032201800 + 81770032201801.

It is an arithmetic number, because the mean of its divisors is an integer number (81770032201801).

Almost surely, 2^{163540064403601} is an apocalyptic number.

It is an amenable number.

163540064403601 is a deficient number, since it is larger than the sum of its proper divisors (1).

163540064403601 is an equidigital number, since it uses as much as digits as its factorization.

163540064403601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 163540064403601 in words is "one hundred sixty-three trillion, five hundred forty billion, sixty-four million, four hundred three thousand, six hundred one".