161040516 has 96 divisors (see below), whose sum is σ = 467953920. Its totient is φ = 41969664.

The previous prime is 161040493. The next prime is 161040521. The reversal of 161040516 is 615040161.

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, 96360 + ... + 98016.

It is an arithmetic number, because the mean of its divisors is an integer number (4874520).

Almost surely, 2^161040516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161040516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233976960).

161040516 is an abundant number, since it is smaller than the sum of its proper divisors (306913404).

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

161040516 is a wasteful number, since it uses less digits than its factorization.

161040516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 161040516 is about 12690.1739940790. The cubic root of 161040516 is about 544.0578126635.

Adding to 161040516 its reverse (615040161), we get a palindrome (776080677).

The spelling of 161040516 in words is "one hundred sixty-one million, forty thousand, five hundred sixteen".