161637167 has 4 divisors (see below), whose sum is σ = 164376840. Its totient is φ = 158897496.

The previous prime is 161637149. The next prime is 161637191. The reversal of 161637167 is 761736161.

161637167 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.

It is a cyclic number.

It is not a de Polignac number, because 161637167 - 2¹⁰ = 161636143 is a prime.

It is a super-2 number, since 2×161637167² = 52253147511571778, which contains 22 as substring.

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 161637167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161637197) 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, 1369748 + ... + 1369865.

It is an arithmetic number, because the mean of its divisors is an integer number (41094210).

Almost surely, 2^161637167 is an apocalyptic number.

161637167 is a deficient number, since it is larger than the sum of its proper divisors (2739673).

161637167 is an equidigital number, since it uses as much as digits as its factorization.

161637167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739672.

The product of its digits is 31752, while the sum is 38.

The square root of 161637167 is about 12713.6606451486. The cubic root of 161637167 is about 544.7288913364.

It can be divided in two parts, 1616 and 37167, that added together give a palindrome (38783).

The spelling of 161637167 in words is "one hundred sixty-one million, six hundred thirty-seven thousand, one hundred sixty-seven".