161564266167 has 8 divisors (see below), whose sum is σ = 215421149424. Its totient is φ = 107708446848.

The previous prime is 161564266117. The next prime is 161564266169. The reversal of 161564266167 is 761662465161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161564266167 - 2¹¹ = 161564264119 is a prime.

It is a super-2 number, since 2×161564266167² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161564266169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210063 + ... + 606015.

It is an arithmetic number, because the mean of its divisors is an integer number (26927643678).

Almost surely, 2^161564266167 is an apocalyptic number.

161564266167 is a deficient number, since it is larger than the sum of its proper divisors (53856883257).

161564266167 is a wasteful number, since it uses less digits than its factorization.

161564266167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531969.

The product of its digits is 2177280, while the sum is 51.

The spelling of 161564266167 in words is "one hundred sixty-one billion, five hundred sixty-four million, two hundred sixty-six thousand, one hundred sixty-seven".