161173812 has 24 divisors (see below), whose sum is σ = 377003200. Its totient is φ = 53591616.

The previous prime is 161173807. The next prime is 161173819. The reversal of 161173812 is 218371161.

It is a super-2 number, since 2×161173812² = 51953995349222688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161173812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161173819) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11512 + ... + 21327.

Almost surely, 2^161173812 is an apocalyptic number.

161173812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161173812 is an abundant number, since it is smaller than the sum of its proper divisors (215829388).

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

161173812 is a wasteful number, since it uses less digits than its factorization.

161173812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33255 (or 33253 counting only the distinct ones).

The product of its digits is 2016, while the sum is 30.

The square root of 161173812 is about 12695.4248451952. The cubic root of 161173812 is about 544.2078799309.

The spelling of 161173812 in words is "one hundred sixty-one million, one hundred seventy-three thousand, eight hundred twelve".