16173163261 has 4 divisors (see below), whose sum is σ = 17024382400. Its totient is φ = 15321944124.

The previous prime is 16173163247. The next prime is 16173163271. The reversal of 16173163261 is 16236137161.

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 16173163261 - 2⁷ = 16173163133 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 16173163261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16173163211) 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, 425609541 + ... + 425609578.

It is an arithmetic number, because the mean of its divisors is an integer number (4256095600).

Almost surely, 2^16173163261 is an apocalyptic number.

It is an amenable number.

16173163261 is a deficient number, since it is larger than the sum of its proper divisors (851219139).

16173163261 is an equidigital number, since it uses as much as digits as its factorization.

16173163261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851219138.

The product of its digits is 27216, while the sum is 37.

The spelling of 16173163261 in words is "sixteen billion, one hundred seventy-three million, one hundred sixty-three thousand, two hundred sixty-one".