161158743 has 12 divisors (see below), whose sum is σ = 237177720. Its totient is φ = 105411696.

The previous prime is 161158721. The next prime is 161158747. The reversal of 161158743 is 347851161.

It is not a de Polignac number, because 161158743 - 2¹⁰ = 161157719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161158698 and 161158707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161158747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168453 + ... + 169406.

It is an arithmetic number, because the mean of its divisors is an integer number (19764810).

Almost surely, 2^161158743 is an apocalyptic number.

161158743 is a deficient number, since it is larger than the sum of its proper divisors (76018977).

161158743 is a wasteful number, since it uses less digits than its factorization.

161158743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337918 (or 337915 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 161158743 is about 12694.8313498053. The cubic root of 161158743 is about 544.1909191024.

The spelling of 161158743 in words is "one hundred sixty-one million, one hundred fifty-eight thousand, seven hundred forty-three".