163431435559 has 4 divisors (see below), whose sum is σ = 186778783504. Its totient is φ = 140084087616.

The previous prime is 163431435553. The next prime is 163431435613. The reversal of 163431435559 is 955534134361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955534134361 = 29 ⋅32949452909.

It is a cyclic number.

It is not a de Polignac number, because 163431435559 - 2³ = 163431435551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163431435551) 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, 11673673962 + ... + 11673673975.

It is an arithmetic number, because the mean of its divisors is an integer number (46694695876).

Almost surely, 2^163431435559 is an apocalyptic number.

163431435559 is a deficient number, since it is larger than the sum of its proper divisors (23347347945).

163431435559 is an equidigital number, since it uses as much as digits as its factorization.

163431435559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23347347944.

The product of its digits is 2916000, while the sum is 49.

The spelling of 163431435559 in words is "one hundred sixty-three billion, four hundred thirty-one million, four hundred thirty-five thousand, five hundred fifty-nine".