161533176442 has 16 divisors (see below), whose sum is σ = 264455217792. Its totient is φ = 73388559520.

The previous prime is 161533176419. The next prime is 161533176443. The reversal of 161533176442 is 244671335161.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (161533176443) 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 7 ways as a sum of consecutive naturals, for example, 1734163 + ... + 1824934.

It is an arithmetic number, because the mean of its divisors is an integer number (16528451112).

Almost surely, 2^161533176442 is an apocalyptic number.

161533176442 is a deficient number, since it is larger than the sum of its proper divisors (102922041350).

161533176442 is a wasteful number, since it uses less digits than its factorization.

161533176442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561173.

The product of its digits is 362880, while the sum is 43.

The spelling of 161533176442 in words is "one hundred sixty-one billion, five hundred thirty-three million, one hundred seventy-six thousand, four hundred forty-two".