161110253464243 has 2 divisors, whose sum is σ = 161110253464244. Its totient is φ = 161110253464242.

The previous prime is 161110253464241. The next prime is 161110253464253. The reversal of 161110253464243 is 342464352011161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161110253464243 - 2¹ = 161110253464241 is a prime.

Together with 161110253464241, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 161110253464243.

It is not a weakly prime, because it can be changed into another prime (161110253464241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80555126732121 + 80555126732122.

It is an arithmetic number, because the mean of its divisors is an integer number (80555126732122).

Almost surely, 2^{161110253464243} is an apocalyptic number.

161110253464243 is a deficient number, since it is larger than the sum of its proper divisors (1).

161110253464243 is an equidigital number, since it uses as much as digits as its factorization.

161110253464243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 161110253464243 in words is "one hundred sixty-one trillion, one hundred ten billion, two hundred fifty-three million, four hundred sixty-four thousand, two hundred forty-three".