161340465 has 32 divisors (see below), whose sum is σ = 303278976. Its totient is φ = 72207360.

The previous prime is 161340451. The next prime is 161340481. The reversal of 161340465 is 564043161.

It is not a de Polignac number, because 161340465 - 2⁸ = 161340209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35464 + ... + 39753.

It is an arithmetic number, because the mean of its divisors is an integer number (9477468).

Almost surely, 2^161340465 is an apocalyptic number.

161340465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161340465 is a deficient number, since it is larger than the sum of its proper divisors (141938511).

161340465 is a wasteful number, since it uses less digits than its factorization.

161340465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75249.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 161340465 is about 12701.9866556378. The cubic root of 161340465 is about 544.3953848231.

The spelling of 161340465 in words is "one hundred sixty-one million, three hundred forty thousand, four hundred sixty-five".