161839436 has 18 divisors (see below), whose sum is σ = 311307780. Its totient is φ = 73563160.

The previous prime is 161839411. The next prime is 161839463. The reversal of 161839436 is 634938161.

161839436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161839393 and 161839402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166706 + ... + 167673.

Almost surely, 2^161839436 is an apocalyptic number.

It is an amenable number.

161839436 is a deficient number, since it is larger than the sum of its proper divisors (149468344).

161839436 is a wasteful number, since it uses less digits than its factorization.

161839436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334405 (or 334392 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 161839436 is about 12721.6129480503. The cubic root of 161839436 is about 544.9560169875.

The spelling of 161839436 in words is "one hundred sixty-one million, eight hundred thirty-nine thousand, four hundred thirty-six".