161065552320247 has 2 divisors, whose sum is σ = 161065552320248. Its totient is φ = 161065552320246.

The previous prime is 161065552320229. The next prime is 161065552320307. The reversal of 161065552320247 is 742023255560161.

It is a weak prime.

It is an emirp because it is prime and its reverse (742023255560161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161065552320247 is a prime.

It is a super-2 number, since 2×161065552320247² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161065552320247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161065552320947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80532776160123 + 80532776160124.

It is an arithmetic number, because the mean of its divisors is an integer number (80532776160124).

Almost surely, 2^{161065552320247} is an apocalyptic number.

161065552320247 is a deficient number, since it is larger than the sum of its proper divisors (1).

161065552320247 is an equidigital number, since it uses as much as digits as its factorization.

161065552320247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 161065552320247 in words is "one hundred sixty-one trillion, sixty-five billion, five hundred fifty-two million, three hundred twenty thousand, two hundred forty-seven".