161982370 has 32 divisors (see below), whose sum is σ = 320241600. Its totient is φ = 58501440.

The previous prime is 161982367. The next prime is 161982377. The reversal of 161982370 is 73289161.

It is not an unprimeable number, because it can be changed into a prime (161982377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11449 + ... + 21331.

It is an arithmetic number, because the mean of its divisors is an integer number (10007550).

Almost surely, 2^161982370 is an apocalyptic number.

161982370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161982370 is a deficient number, since it is larger than the sum of its proper divisors (158259230).

161982370 is a wasteful number, since it uses less digits than its factorization.

161982370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 161982370 is about 12727.2294707057. The cubic root of 161982370 is about 545.1164019248.

The spelling of 161982370 in words is "one hundred sixty-one million, nine hundred eighty-two thousand, three hundred seventy".