161189357 has 8 divisors (see below), whose sum is σ = 187339200. Its totient is φ = 135820224.

The previous prime is 161189351. The next prime is 161189411. The reversal of 161189357 is 753981161.

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

It is a cyclic number.

It is not a de Polignac number, because 161189357 - 2⁴ = 161189341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161189351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194732 + ... + 195557.

It is an arithmetic number, because the mean of its divisors is an integer number (23417400).

Almost surely, 2^161189357 is an apocalyptic number.

It is an amenable number.

161189357 is a deficient number, since it is larger than the sum of its proper divisors (26149843).

161189357 is an equidigital number, since it uses as much as digits as its factorization.

161189357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390355.

The product of its digits is 45360, while the sum is 41.

The square root of 161189357 is about 12696.0370588621. The cubic root of 161189357 is about 544.2253754107.

The spelling of 161189357 in words is "one hundred sixty-one million, one hundred eighty-nine thousand, three hundred fifty-seven".