161145863 has 2 divisors, whose sum is σ = 161145864. Its totient is φ = 161145862.

The previous prime is 161145857. The next prime is 161145871. The reversal of 161145863 is 368541161.

It is a weak prime.

It is an emirp because it is prime and its reverse (368541161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161145863 - 2⁴ = 161145847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161145833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80572931 + 80572932.

It is an arithmetic number, because the mean of its divisors is an integer number (80572932).

Almost surely, 2^161145863 is an apocalyptic number.

161145863 is a deficient number, since it is larger than the sum of its proper divisors (1).

161145863 is an equidigital number, since it uses as much as digits as its factorization.

161145863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 161145863 is about 12694.3240465966. The cubic root of 161145863 is about 544.1764212526.

It can be divided in two parts, 1611 and 45863, that added together give a palindrome (47474).

The spelling of 161145863 in words is "one hundred sixty-one million, one hundred forty-five thousand, eight hundred sixty-three".