161032365563 has 4 divisors (see below), whose sum is σ = 161035588320. Its totient is φ = 161029142808.

The previous prime is 161032365497. The next prime is 161032365607. The reversal of 161032365563 is 365563230161.

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

It is a cyclic number.

It is not a de Polignac number, because 161032365563 - 2¹⁰ = 161032364539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161032365563.

It is not an unprimeable number, because it can be changed into a prime (161032365763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535228 + ... + 1636761.

It is an arithmetic number, because the mean of its divisors is an integer number (40258897080).

Almost surely, 2^161032365563 is an apocalyptic number.

161032365563 is a deficient number, since it is larger than the sum of its proper divisors (3222757).

161032365563 is an equidigital number, since it uses as much as digits as its factorization.

161032365563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222756.

The product of its (nonzero) digits is 291600, while the sum is 41.

The spelling of 161032365563 in words is "one hundred sixty-one billion, thirty-two million, three hundred sixty-five thousand, five hundred sixty-three".