161056614740321 has 2 divisors, whose sum is σ = 161056614740322. Its totient is φ = 161056614740320.

The previous prime is 161056614740311. The next prime is 161056614740341. The reversal of 161056614740321 is 123047416650161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155174631661921 + 5881983078400 = 12456911^2 + 2425280^2 .

It is a cyclic number.

It is not a de Polignac number, because 161056614740321 - 2²⁶ = 161056547631457 is a prime.

It is a super-2 number, since 2×161056614740321² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161056614740311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80528307370160 + 80528307370161.

It is an arithmetic number, because the mean of its divisors is an integer number (80528307370161).

Almost surely, 2^{161056614740321} is an apocalyptic number.

It is an amenable number.

161056614740321 is a deficient number, since it is larger than the sum of its proper divisors (1).

161056614740321 is an equidigital number, since it uses as much as digits as its factorization.

161056614740321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 161056614740321 in words is "one hundred sixty-one trillion, fifty-six billion, six hundred fourteen million, seven hundred forty thousand, three hundred twenty-one".