161186630 has 32 divisors (see below), whose sum is σ = 317979648. Its totient is φ = 58341600.

The previous prime is 161186609. The next prime is 161186647. The reversal of 161186630 is 36681161.

It is a super-2 number, since 2×161186630² = 51962259381513800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21245 + ... + 27815.

It is an arithmetic number, because the mean of its divisors is an integer number (9936864).

Almost surely, 2^161186630 is an apocalyptic number.

161186630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161186630 is a deficient number, since it is larger than the sum of its proper divisors (156793018).

161186630 is a wasteful number, since it uses less digits than its factorization.

161186630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6812.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 161186630 is about 12695.9296626911. The cubic root of 161186630 is about 544.2223063268. Note that the first 3 decimals are identical.

The spelling of 161186630 in words is "one hundred sixty-one million, one hundred eighty-six thousand, six hundred thirty".