161141565 has 128 divisors (see below), whose sum is σ = 319979520. Its totient is φ = 68428800.

The previous prime is 161141557. The next prime is 161141569. The reversal of 161141565 is 565141161.

It is not a de Polignac number, because 161141565 - 2³ = 161141557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161141569) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2641635 + ... + 2641695.

It is an arithmetic number, because the mean of its divisors is an integer number (2499840).

Almost surely, 2^161141565 is an apocalyptic number.

161141565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161141565 is a deficient number, since it is larger than the sum of its proper divisors (158837955).

161141565 is a wasteful number, since it uses less digits than its factorization.

161141565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155.

The product of its digits is 3600, while the sum is 30.

The square root of 161141565 is about 12694.1547572101. The cubic root of 161141565 is about 544.1715832112.

The spelling of 161141565 in words is "one hundred sixty-one million, one hundred forty-one thousand, five hundred sixty-five".