161833563 has 6 divisors (see below), whose sum is σ = 233759604. Its totient is φ = 107889036.

The previous prime is 161833531. The next prime is 161833577. The reversal of 161833563 is 365338161.

It is a happy number.

161833563 is a `hidden beast` number, since 1 + 61 + 8 + 33 + 563 = 666.

161833563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161833563 - 2⁵ = 161833531 is a prime.

It is a super-2 number, since 2×161833563² = 52380204226549938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161832563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8990745 + ... + 8990762.

It is an arithmetic number, because the mean of its divisors is an integer number (38959934).

Almost surely, 2^161833563 is an apocalyptic number.

161833563 is a deficient number, since it is larger than the sum of its proper divisors (71926041).

161833563 is a wasteful number, since it uses less digits than its factorization.

161833563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17981513 (or 17981510 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 161833563 is about 12721.3821183077. The cubic root of 161833563 is about 544.9494249284.

The spelling of 161833563 in words is "one hundred sixty-one million, eight hundred thirty-three thousand, five hundred sixty-three".