161560365 has 16 divisors (see below), whose sum is σ = 261403200. Its totient is φ = 85196672.

The previous prime is 161560361. The next prime is 161560381. The reversal of 161560365 is 563065161.

161560365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161560365 - 2² = 161560361 is a prime.

It is a super-2 number, since 2×161560365² = 52203503077866450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161560361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59175 + ... + 61844.

It is an arithmetic number, because the mean of its divisors is an integer number (16337700).

Almost surely, 2^161560365 is an apocalyptic number.

161560365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161560365 is a deficient number, since it is larger than the sum of its proper divisors (99842835).

161560365 is a wasteful number, since it uses less digits than its factorization.

161560365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121116.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 161560365 is about 12710.6398344064. The cubic root of 161560365 is about 544.6426015781.

The spelling of 161560365 in words is "one hundred sixty-one million, five hundred sixty thousand, three hundred sixty-five".