161208968 has 20 divisors (see below), whose sum is σ = 306846615. Its totient is φ = 79401432.

The previous prime is 161208961. The next prime is 161208973. The reversal of 161208968 is 869802161.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

161208968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 80604484 + 80604484 = 8978^2 + 8978^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8978.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161208961) by changing a digit.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 2406071 + ... + 2406137.

Almost surely, 2^161208968 is an apocalyptic number.

It is an amenable number.

161208968 is a deficient number, since it is larger than the sum of its proper divisors (145637647).

161208968 is an frugal number, since it uses more digits than its factorization.

161208968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 161208968 is about 12696.8093629856. The cubic root of 161208968 is about 544.2474454597.

Multiplying 161208968 by its product of nonzero digits (41472), we get a 4-th power (6685658320896 = 1608⁴).

The spelling of 161208968 in words is "one hundred sixty-one million, two hundred eight thousand, nine hundred sixty-eight".