161104560 has 40 divisors (see below), whose sum is σ = 499424880. Its totient is φ = 42961152.

The previous prime is 161104519. The next prime is 161104561. The reversal of 161104560 is 65401161.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 161104560.

It is not an unprimeable number, because it can be changed into a prime (161104561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335395 + ... + 335874.

It is an arithmetic number, because the mean of its divisors is an integer number (12485622).

Almost surely, 2^161104560 is an apocalyptic number.

161104560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161104560 is an abundant number, since it is smaller than the sum of its proper divisors (338320320).

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

161104560 is a wasteful number, since it uses less digits than its factorization.

161104560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671285 (or 671279 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 161104560 is about 12692.6971129071. The cubic root of 161104560 is about 544.1299249937.

The spelling of 161104560 in words is "one hundred sixty-one million, one hundred four thousand, five hundred sixty".