161106056501443 has 2 divisors, whose sum is σ = 161106056501444. Its totient is φ = 161106056501442.

The previous prime is 161106056501371. The next prime is 161106056501603. The reversal of 161106056501443 is 344105650601161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161106056501443 - 2²¹ = 161106054404291 is a prime.

It is a super-2 number, since 2×161106056501443² (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 161106056501443.

It is not a weakly prime, because it can be changed into another prime (161106056501743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80553028250721 + 80553028250722.

It is an arithmetic number, because the mean of its divisors is an integer number (80553028250722).

Almost surely, 2^{161106056501443} is an apocalyptic number.

161106056501443 is a deficient number, since it is larger than the sum of its proper divisors (1).

161106056501443 is an equidigital number, since it uses as much as digits as its factorization.

161106056501443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 161106056501443 in words is "one hundred sixty-one trillion, one hundred six billion, fifty-six million, five hundred one thousand, four hundred forty-three".