161338065 has 16 divisors (see below), whose sum is σ = 295018368. Its totient is φ = 73754496.

The previous prime is 161338039. The next prime is 161338069. The reversal of 161338065 is 560833161.

It is not a de Polignac number, because 161338065 - 2⁵ = 161338033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161338069) 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, 768172 + ... + 768381.

It is an arithmetic number, because the mean of its divisors is an integer number (18438648).

Almost surely, 2^161338065 is an apocalyptic number.

161338065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161338065 is a deficient number, since it is larger than the sum of its proper divisors (133680303).

161338065 is a wasteful number, since it uses less digits than its factorization.

161338065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536568.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 161338065 is about 12701.8921818759. The cubic root of 161338065 is about 544.3926854478.

The spelling of 161338065 in words is "one hundred sixty-one million, three hundred thirty-eight thousand, sixty-five".