161600235440565 has 8 divisors (see below), whose sum is σ = 258560376704928. Its totient is φ = 86186792234960.

The previous prime is 161600235440563. The next prime is 161600235440569. The reversal of 161600235440565 is 565044532006161.

It is a happy number.

161600235440565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161600235440565 - 2¹ = 161600235440563 is a prime.

It is a super-2 number, since 2×161600235440565² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161600235440561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5386674514671 + ... + 5386674514700.

It is an arithmetic number, because the mean of its divisors is an integer number (32320047088116).

Almost surely, 2^{161600235440565} is an apocalyptic number.

161600235440565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161600235440565 is a deficient number, since it is larger than the sum of its proper divisors (96960141264363).

161600235440565 is a wasteful number, since it uses less digits than its factorization.

161600235440565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10773349029379.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 161600235440565 in words is "one hundred sixty-one trillion, six hundred billion, two hundred thirty-five million, four hundred forty thousand, five hundred sixty-five".