161585465 has 16 divisors (see below), whose sum is σ = 202929408. Its totient is φ = 123283776.

The previous prime is 161585453. The next prime is 161585467. The reversal of 161585465 is 564585161.

It is a cyclic number.

It is not a de Polignac number, because 161585465 - 2⁴ = 161585449 is a prime.

It is a super-2 number, since 2×161585465² = 52219724998532450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161585467) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 41012 + ... + 44778.

It is an arithmetic number, because the mean of its divisors is an integer number (12683088).

Almost surely, 2^161585465 is an apocalyptic number.

It is an amenable number.

161585465 is a deficient number, since it is larger than the sum of its proper divisors (41343943).

161585465 is a wasteful number, since it uses less digits than its factorization.

161585465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168.

The product of its digits is 144000, while the sum is 41.

The square root of 161585465 is about 12711.6271578425. The cubic root of 161585465 is about 544.6708053218.

The spelling of 161585465 in words is "one hundred sixty-one million, five hundred eighty-five thousand, four hundred sixty-five".