161289546 has 16 divisors (see below), whose sum is σ = 351904608. Its totient is φ = 48875600.

The previous prime is 161289487. The next prime is 161289577. The reversal of 161289546 is 645982161.

161289546 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161289546² = 52028635297772232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161289498 and 161289507.

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 7 ways as a sum of consecutive naturals, for example, 1221825 + ... + 1221956.

It is an arithmetic number, because the mean of its divisors is an integer number (21994038).

Almost surely, 2^161289546 is an apocalyptic number.

161289546 is an abundant number, since it is smaller than the sum of its proper divisors (190615062).

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

161289546 is a wasteful number, since it uses less digits than its factorization.

161289546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443797.

The product of its digits is 103680, while the sum is 42.

The square root of 161289546 is about 12699.9821259717. The cubic root of 161289546 is about 544.3381084598.

The spelling of 161289546 in words is "one hundred sixty-one million, two hundred eighty-nine thousand, five hundred forty-six".