163550530643261 has 4 divisors (see below), whose sum is σ = 163550675410752. Its totient is φ = 163550385875772.

The previous prime is 163550530643243. The next prime is 163550530643293. The reversal of 163550530643261 is 162346035055361.

163550530643261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 163550530643261 - 2¹⁴ = 163550530626877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163550530643231) 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, 70675691 + ... + 72953096.

It is an arithmetic number, because the mean of its divisors is an integer number (40887668852688).

Almost surely, 2^{163550530643261} is an apocalyptic number.

It is an amenable number.

163550530643261 is a deficient number, since it is larger than the sum of its proper divisors (144767491).

163550530643261 is a wasteful number, since it uses less digits than its factorization.

163550530643261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144767490.

The product of its (nonzero) digits is 5832000, while the sum is 50.

The spelling of 163550530643261 in words is "one hundred sixty-three trillion, five hundred fifty billion, five hundred thirty million, six hundred forty-three thousand, two hundred sixty-one".