161055564 has 12 divisors (see below), whose sum is σ = 375796344. Its totient is φ = 53685184.

The previous prime is 161055563. The next prime is 161055581. The reversal of 161055564 is 465550161.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (161055563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6710637 + ... + 6710660.

It is an arithmetic number, because the mean of its divisors is an integer number (31316362).

Almost surely, 2^161055564 is an apocalyptic number.

It is an amenable number.

161055564 is an abundant number, since it is smaller than the sum of its proper divisors (214740780).

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

161055564 is a wasteful number, since it uses less digits than its factorization.

161055564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421304 (or 13421302 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 161055564 is about 12690.7668799013. The cubic root of 161055564 is about 544.0747581444.

The spelling of 161055564 in words is "one hundred sixty-one million, fifty-five thousand, five hundred sixty-four".