161158633 has 4 divisors (see below), whose sum is σ = 161336448. Its totient is φ = 160980820.

The previous prime is 161158609. The next prime is 161158649. The reversal of 161158633 is 336851161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 336851161 = 211 ⋅1596451.

It is a cyclic number.

It is not a de Polignac number, because 161158633 - 2²¹ = 159061481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161158603) 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, 87541 + ... + 89362.

It is an arithmetic number, because the mean of its divisors is an integer number (40334112).

Almost surely, 2^161158633 is an apocalyptic number.

It is an amenable number.

161158633 is a deficient number, since it is larger than the sum of its proper divisors (177815).

161158633 is an equidigital number, since it uses as much as digits as its factorization.

161158633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177814.

The product of its digits is 12960, while the sum is 34.

The square root of 161158633 is about 12694.8270173327. The cubic root of 161158633 is about 544.1907952886.

The spelling of 161158633 in words is "one hundred sixty-one million, one hundred fifty-eight thousand, six hundred thirty-three".