561500532163 has 4 divisors (see below), whose sum is σ = 563737586328. Its totient is φ = 559263478000.

The previous prime is 561500532157. The next prime is 561500532211. The reversal of 561500532163 is 361235005165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561500532163 is a prime.

It is a super-3 number, since 3×561500532163³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561500532133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118526706 + ... + 1118527207.

It is an arithmetic number, because the mean of its divisors is an integer number (140934396582).

Almost surely, 2^561500532163 is an apocalyptic number.

561500532163 is a deficient number, since it is larger than the sum of its proper divisors (2237054165).

561500532163 is a wasteful number, since it uses less digits than its factorization.

561500532163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237054164.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 561500532163 in words is "five hundred sixty-one billion, five hundred million, five hundred thirty-two thousand, one hundred sixty-three".