161851450396 has 12 divisors (see below), whose sum is σ = 283807657000. Its totient is φ = 80763548400.

The previous prime is 161851450393. The next prime is 161851450421. The reversal of 161851450396 is 693054158161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161851450393) 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 3 ways as a sum of consecutive naturals, for example, 40541955 + ... + 40545946.

Almost surely, 2^161851450396 is an apocalyptic number.

It is an amenable number.

161851450396 is a deficient number, since it is larger than the sum of its proper divisors (121956206604).

161851450396 is a wasteful number, since it uses less digits than its factorization.

161851450396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81088404 (or 81088402 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 161851450396 in words is "one hundred sixty-one billion, eight hundred fifty-one million, four hundred fifty thousand, three hundred ninety-six".