161646441167 has 4 divisors (see below), whose sum is σ = 161747661576. Its totient is φ = 161545220760.

The previous prime is 161646441139. The next prime is 161646441223. The reversal of 161646441167 is 761144646161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 761144646161 = 29 ⋅26246367109.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161646441167 is a prime.

It is a super-2 number, since 2×161646441167² (a number of 23 digits) contains 22 as substring.

It is a pancake number, because a pancake can be divided into 161646441167 parts by 568588 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161646441667) 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, 50607809 + ... + 50611002.

It is an arithmetic number, because the mean of its divisors is an integer number (40436915394).

Almost surely, 2^161646441167 is an apocalyptic number.

161646441167 is a deficient number, since it is larger than the sum of its proper divisors (101220409).

161646441167 is a wasteful number, since it uses less digits than its factorization.

161646441167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101220408.

The product of its digits is 580608, while the sum is 47.

The spelling of 161646441167 in words is "one hundred sixty-one billion, six hundred forty-six million, four hundred forty-one thousand, one hundred sixty-seven".