161345144563 has 2 divisors, whose sum is σ = 161345144564. Its totient is φ = 161345144562.

The previous prime is 161345144561. The next prime is 161345144581. The reversal of 161345144563 is 365441543161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161345144563 - 2¹ = 161345144561 is a prime.

Together with 161345144561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161345144561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80672572281 + 80672572282.

It is an arithmetic number, because the mean of its divisors is an integer number (80672572282).

Almost surely, 2^161345144563 is an apocalyptic number.

161345144563 is a deficient number, since it is larger than the sum of its proper divisors (1).

161345144563 is an equidigital number, since it uses as much as digits as its factorization.

161345144563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 43.

The spelling of 161345144563 in words is "one hundred sixty-one billion, three hundred forty-five million, one hundred forty-four thousand, five hundred sixty-three".