161788862 has 4 divisors (see below), whose sum is σ = 242683296. Its totient is φ = 80894430.

The previous prime is 161788849. The next prime is 161788867. The reversal of 161788862 is 268887161.

It is a happy number.

161788862 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 268887161 = 2311 ⋅116351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161788867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40447214 + ... + 40447217.

It is an arithmetic number, because the mean of its divisors is an integer number (60670824).

Almost surely, 2^161788862 is an apocalyptic number.

161788862 is a deficient number, since it is larger than the sum of its proper divisors (80894434).

161788862 is an equidigital number, since it uses as much as digits as its factorization.

161788862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80894433.

The product of its digits is 258048, while the sum is 47.

The square root of 161788862 is about 12719.6250730908. The cubic root of 161788862 is about 544.8992457464.

The spelling of 161788862 in words is "one hundred sixty-one million, seven hundred eighty-eight thousand, eight hundred sixty-two".