161694330 has 32 divisors (see below), whose sum is σ = 443505024. Its totient is φ = 36958656.

The previous prime is 161694289. The next prime is 161694373. The reversal of 161694330 is 33496161.

It is a super-2 number, since 2×161694330² = 52290112708297800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161694291 and 161694300.

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, 384777 + ... + 385196.

It is an arithmetic number, because the mean of its divisors is an integer number (13859532).

Almost surely, 2^161694330 is an apocalyptic number.

161694330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161694330 is an abundant number, since it is smaller than the sum of its proper divisors (281810694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161694330 is a wasteful number, since it uses less digits than its factorization.

161694330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769990.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 161694330 is about 12715.9085400926. The cubic root of 161694330 is about 544.7930982434.

The spelling of 161694330 in words is "one hundred sixty-one million, six hundred ninety-four thousand, three hundred thirty".