161508768 has 24 divisors (see below), whose sum is σ = 423960768. Its totient is φ = 53836224.

The previous prime is 161508761. The next prime is 161508803. The reversal of 161508768 is 867805161.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (161508761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841096 + ... + 841287.

It is an arithmetic number, because the mean of its divisors is an integer number (17665032).

Almost surely, 2^161508768 is an apocalyptic number.

It is an amenable number.

161508768 is an abundant number, since it is smaller than the sum of its proper divisors (262452000).

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

161508768 is a wasteful number, since it uses less digits than its factorization.

161508768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682396 (or 1682388 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 161508768 is about 12708.6099948027. The cubic root of 161508768 is about 544.5846151686.

The spelling of 161508768 in words is "one hundred sixty-one million, five hundred eight thousand, seven hundred sixty-eight".