161433504000 has 432 divisors, whose sum is σ = 606165565824. Its totient is φ = 41175552000.

The previous prime is 161433503983. The next prime is 161433504013. The reversal of 161433504000 is 405334161.

161433504000 is a `hidden beast` number, since 1 + 614 + 3 + 3 + 5 + 0 + 40 + 0 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6611815 + ... + 6636185.

It is an arithmetic number, because the mean of its divisors is an integer number (1403161032).

Almost surely, 2^161433504000 is an apocalyptic number.

161433504000 is a gapful number since it is divisible by the number (10) 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 161433504000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303082782912).

161433504000 is an abundant number, since it is smaller than the sum of its proper divisors (444732061824).

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

161433504000 is a wasteful number, since it uses less digits than its factorization.

161433504000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24431 (or 24404 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 161433504000 its reverse (405334161), we get a palindrome (161838838161).

The spelling of 161433504000 in words is "one hundred sixty-one billion, four hundred thirty-three million, five hundred four thousand".