161992512 has 168 divisors, whose sum is σ = 520976352. Its totient is φ = 47692800.

The previous prime is 161992487. The next prime is 161992561. The reversal of 161992512 is 215299161.

161992512 is a `hidden beast` number, since 1 + 619 + 9 + 25 + 12 = 666.

161992512 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234087 + ... + 234777.

Almost surely, 2^161992512 is an apocalyptic number.

161992512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161992512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260488176).

161992512 is an abundant number, since it is smaller than the sum of its proper divisors (358983840).

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

161992512 is a wasteful number, since it uses less digits than its factorization.

161992512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 744 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 161992512 is about 12727.6279015377. The cubic root of 161992512 is about 545.1277785850.

The spelling of 161992512 in words is "one hundred sixty-one million, nine hundred ninety-two thousand, five hundred twelve".