161590563 has 6 divisors (see below), whose sum is σ = 233408604. Its totient is φ = 107727036.

The previous prime is 161590519. The next prime is 161590589. The reversal of 161590563 is 365095161.

161590563 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 90 + 563 = 666.

It is not a de Polignac number, because 161590563 - 2¹⁷ = 161459491 is a prime.

It is a super-2 number, since 2×161590563² = 52223020101313938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161590463) 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 in 5 ways as a sum of consecutive naturals, for example, 8977245 + ... + 8977262.

It is an arithmetic number, because the mean of its divisors is an integer number (38901434).

Almost surely, 2^161590563 is an apocalyptic number.

161590563 is a deficient number, since it is larger than the sum of its proper divisors (71818041).

161590563 is a wasteful number, since it uses less digits than its factorization.

161590563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17954513 (or 17954510 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 161590563 is about 12711.8276813368. The cubic root of 161590563 is about 544.6765333588.

The spelling of 161590563 in words is "one hundred sixty-one million, five hundred ninety thousand, five hundred sixty-three".