161532316136 has 16 divisors (see below), whose sum is σ = 302902994340. Its totient is φ = 80758184320.

The previous prime is 161532316129. The next prime is 161532316139. The reversal of 161532316136 is 631613235161.

It can be written as a sum of positive squares in 2 ways, for example, as 151593422500 + 9938893636 = 389350^2 + 99694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161532316136.

It is not an unprimeable number, because it can be changed into a prime (161532316139) 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, 910181 + ... + 1073076.

Almost surely, 2^161532316136 is an apocalyptic number.

It is an amenable number.

161532316136 is a deficient number, since it is larger than the sum of its proper divisors (141370678204).

161532316136 is a wasteful number, since it uses less digits than its factorization.

161532316136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993444 (or 1993440 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The spelling of 161532316136 in words is "one hundred sixty-one billion, five hundred thirty-two million, three hundred sixteen thousand, one hundred thirty-six".