163609291841 has 4 divisors (see below), whose sum is σ = 164465885184. Its totient is φ = 162752698500.

The previous prime is 163609291837. The next prime is 163609291877. The reversal of 163609291841 is 148192906361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163609291841 - 2² = 163609291837 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 163609291841.

It is not an unprimeable number, because it can be changed into a prime (163609291891) 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, 428296385 + ... + 428296766.

It is an arithmetic number, because the mean of its divisors is an integer number (41116471296).

Almost surely, 2^163609291841 is an apocalyptic number.

It is an amenable number.

163609291841 is a deficient number, since it is larger than the sum of its proper divisors (856593343).

163609291841 is an equidigital number, since it uses as much as digits as its factorization.

163609291841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856593342.

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 163609291841 in words is "one hundred sixty-three billion, six hundred nine million, two hundred ninety-one thousand, eight hundred forty-one".