161856708 has 36 divisors (see below), whose sum is σ = 408956688. Its totient is φ = 49801440.

The previous prime is 161856707. The next prime is 161856731. The reversal of 161856708 is 807658161.

161856708 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161856708.

It is not an unprimeable number, because it can be changed into a prime (161856707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37878 + ... + 41933.

It is an arithmetic number, because the mean of its divisors is an integer number (11359908).

Almost surely, 2^161856708 is an apocalyptic number.

It is an amenable number.

161856708 is an abundant number, since it is smaller than the sum of its proper divisors (247099980).

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

161856708 is a wasteful number, since it uses less digits than its factorization.

161856708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79844 (or 79829 counting only the distinct ones).

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

The square root of 161856708 is about 12722.2917746764. The cubic root of 161856708 is about 544.9754027560.

The spelling of 161856708 in words is "one hundred sixty-one million, eight hundred fifty-six thousand, seven hundred eight".