161517616 has 40 divisors (see below), whose sum is σ = 341790624. Its totient is φ = 73489920.

The previous prime is 161517599. The next prime is 161517641. The reversal of 161517616 is 616715161.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 9300 + ... + 20236.

Almost surely, 2^161517616 is an apocalyptic number.

161517616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161517616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170895312).

161517616 is an abundant number, since it is smaller than the sum of its proper divisors (180273008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161517616 is a wasteful number, since it uses less digits than its factorization.

161517616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11029 (or 11023 counting only the distinct ones).

The product of its digits is 7560, while the sum is 34.

The square root of 161517616 is about 12708.9581004896. The cubic root of 161517616 is about 544.5945597199.

The spelling of 161517616 in words is "one hundred sixty-one million, five hundred seventeen thousand, six hundred sixteen".