161216764 has 6 divisors (see below), whose sum is σ = 282129344. Its totient is φ = 80608380.

The previous prime is 161216747. The next prime is 161216773. The reversal of 161216764 is 467612161.

161216764 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20152092 + ... + 20152099.

Almost surely, 2^161216764 is an apocalyptic number.

It is an amenable number.

161216764 is a deficient number, since it is larger than the sum of its proper divisors (120912580).

161216764 is a wasteful number, since it uses less digits than its factorization.

161216764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40304195 (or 40304193 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 161216764 is about 12697.1163655375. The cubic root of 161216764 is about 544.2562185132.

The spelling of 161216764 in words is "one hundred sixty-one million, two hundred sixteen thousand, seven hundred sixty-four".