161646455 has 32 divisors (see below), whose sum is σ = 210988800. Its totient is φ = 118444032.

The previous prime is 161646439. The next prime is 161646469. The reversal of 161646455 is 554646161.

It is a happy number.

It is not a de Polignac number, because 161646455 - 2⁴ = 161646439 is a prime.

It is a super-2 number, since 2×161646455² = 52259152828134050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676226 + ... + 676464.

It is an arithmetic number, because the mean of its divisors is an integer number (6593400).

Almost surely, 2^161646455 is an apocalyptic number.

161646455 is a deficient number, since it is larger than the sum of its proper divisors (49342345).

161646455 is a wasteful number, since it uses less digits than its factorization.

161646455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443.

The product of its digits is 86400, while the sum is 38.

The square root of 161646455 is about 12714.0259162863. The cubic root of 161646455 is about 544.7393248795.

The spelling of 161646455 in words is "one hundred sixty-one million, six hundred forty-six thousand, four hundred fifty-five".