161546418 has 24 divisors (see below), whose sum is σ = 381837456. Its totient is φ = 48953400.

The previous prime is 161546381. The next prime is 161546431. The reversal of 161546418 is 814645161.

161546418 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 4 + 641 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 407748 + ... + 408143.

It is an arithmetic number, because the mean of its divisors is an integer number (15909894).

Almost surely, 2^161546418 is an apocalyptic number.

161546418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161546418 is an abundant number, since it is smaller than the sum of its proper divisors (220291038).

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

161546418 is a wasteful number, since it uses less digits than its factorization.

161546418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815910 (or 815907 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 161546418 is about 12710.0911877138. The cubic root of 161546418 is about 544.6269286974.

The spelling of 161546418 in words is "one hundred sixty-one million, five hundred forty-six thousand, four hundred eighteen".