161655412 has 12 divisors (see below), whose sum is σ = 283017700. Its totient is φ = 80793216.

The previous prime is 161655407. The next prime is 161655433. The reversal of 161655412 is 214556161.

It can be written as a sum of positive squares in 2 ways, for example, as 145057936 + 16597476 = 12044^2 + 4074^2 .

It is a super-2 number, since 2×161655412² = 52264944457779488, 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 3 ways as a sum of consecutive naturals, for example, 3964 + ... + 18412.

Almost surely, 2^161655412 is an apocalyptic number.

It is an amenable number.

161655412 is a deficient number, since it is larger than the sum of its proper divisors (121362288).

161655412 is a wasteful number, since it uses less digits than its factorization.

161655412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17250 (or 17248 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 161655412 is about 12714.3781601776. The cubic root of 161655412 is about 544.7493862199.

The spelling of 161655412 in words is "one hundred sixty-one million, six hundred fifty-five thousand, four hundred twelve".