161433965376 has 42 divisors (see below), whose sum is σ = 462721315602. Its totient is φ = 53811321600.

The previous prime is 161433965347. The next prime is 161433965377. The reversal of 161433965376 is 673569334161.

161433965376 is a `hidden beast` number, since 1 + 6 + 1 + 433 + 96 + 53 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 101812046400 + 59621918976 = 319080^2 + 244176^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161433965377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140133075 + ... + 140134226.

It is an arithmetic number, because the mean of its divisors is an integer number (11017174181).

Almost surely, 2^161433965376 is an apocalyptic number.

161433965376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161433965376 is an abundant number, since it is smaller than the sum of its proper divisors (301287350226).

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

161433965376 is a wasteful number, since it uses less digits than its factorization.

161433965376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280267319 (or 280267306 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The spelling of 161433965376 in words is "one hundred sixty-one billion, four hundred thirty-three million, nine hundred sixty-five thousand, three hundred seventy-six".