161885064 has 64 divisors (see below), whose sum is σ = 453464640. Its totient is φ = 47727360.

The previous prime is 161885057. The next prime is 161885077. The reversal of 161885064 is 460588161.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1482 + ... + 18054.

It is an arithmetic number, because the mean of its divisors is an integer number (7085385).

Almost surely, 2^161885064 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 161885064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226732320).

161885064 is an abundant number, since it is smaller than the sum of its proper divisors (291579576).

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

161885064 is a wasteful number, since it uses less digits than its factorization.

161885064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16630 (or 16626 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 161885064 is about 12723.4061477263. The cubic root of 161885064 is about 545.0072260075.

The spelling of 161885064 in words is "one hundred sixty-one million, eight hundred eighty-five thousand, sixty-four".