161376565 has 8 divisors (see below), whose sum is σ = 221316480. Its totient is φ = 110658192.

The previous prime is 161376559. The next prime is 161376583. The reversal of 161376565 is 565673161.

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

It is a cyclic number.

It is not a de Polignac number, because 161376565 - 2¹³ = 161368373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2305345 + ... + 2305414.

It is an arithmetic number, because the mean of its divisors is an integer number (27664560).

Almost surely, 2^161376565 is an apocalyptic number.

It is an amenable number.

161376565 is a deficient number, since it is larger than the sum of its proper divisors (59939915).

161376565 is an equidigital number, since it uses as much as digits as its factorization.

161376565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4610771.

The product of its digits is 113400, while the sum is 40.

The square root of 161376565 is about 12703.4076137074. The cubic root of 161376565 is about 544.4359846974.

The spelling of 161376565 in words is "one hundred sixty-one million, three hundred seventy-six thousand, five hundred sixty-five".