161784912 has 40 divisors (see below), whose sum is σ = 422651520. Its totient is φ = 53320960.

The previous prime is 161784911. The next prime is 161784923. The reversal of 161784912 is 219487161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161784911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14664 + ... + 23207.

It is an arithmetic number, because the mean of its divisors is an integer number (10566288).

Almost surely, 2^161784912 is an apocalyptic number.

161784912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161784912 is an abundant number, since it is smaller than the sum of its proper divisors (260866608).

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

161784912 is a wasteful number, since it uses less digits than its factorization.

161784912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37971 (or 37965 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 161784912 is about 12719.4698002708. The cubic root of 161784912 is about 544.8948112229.

The spelling of 161784912 in words is "one hundred sixty-one million, seven hundred eighty-four thousand, nine hundred twelve".