161838862 has 4 divisors (see below), whose sum is σ = 242758296. Its totient is φ = 80919430.

The previous prime is 161838823. The next prime is 161838869. The reversal of 161838862 is 268838161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 268838161 = 59 ⋅4556579.

It is a super-3 number, since 3×161838862³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161838869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40459714 + ... + 40459717.

It is an arithmetic number, because the mean of its divisors is an integer number (60689574).

Almost surely, 2^161838862 is an apocalyptic number.

161838862 is a deficient number, since it is larger than the sum of its proper divisors (80919434).

161838862 is an equidigital number, since it uses as much as digits as its factorization.

161838862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80919433.

The product of its digits is 110592, while the sum is 43.

The square root of 161838862 is about 12721.5903879979. The cubic root of 161838862 is about 544.9553727170.

The spelling of 161838862 in words is "one hundred sixty-one million, eight hundred thirty-eight thousand, eight hundred sixty-two".