161608515 has 16 divisors (see below), whose sum is σ = 259116288. Its totient is φ = 86010336.

The previous prime is 161608507. The next prime is 161608519. The reversal of 161608515 is 515806161.

161608515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161608515 - 2³ = 161608507 is a prime.

It is a super-2 number, since 2×161608515² = 52234624241010450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161608519) 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, 3757 + ... + 18366.

It is an arithmetic number, because the mean of its divisors is an integer number (16194768).

Almost surely, 2^161608515 is an apocalyptic number.

161608515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161608515 is a deficient number, since it is larger than the sum of its proper divisors (97507773).

161608515 is a wasteful number, since it uses less digits than its factorization.

161608515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22618.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 161608515 is about 12712.5337757663. The cubic root of 161608515 is about 544.6967030001.

The spelling of 161608515 in words is "one hundred sixty-one million, six hundred eight thousand, five hundred fifteen".