161536960836 has 36 divisors (see below), whose sum is σ = 408410366364. Its totient is φ = 53834995200.

The previous prime is 161536960789. The next prime is 161536960843. The reversal of 161536960836 is 638069635161.

161536960836 is a `hidden beast` number, since 16 + 1 + 536 + 9 + 60 + 8 + 36 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5783602500 + 155753358336 = 76050^2 + 394656^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×161536960836² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 258645 + ... + 624476.

It is an arithmetic number, because the mean of its divisors is an integer number (11344732399).

Almost surely, 2^161536960836 is an apocalyptic number.

It is an amenable number.

161536960836 is an abundant number, since it is smaller than the sum of its proper divisors (246873405528).

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

161536960836 is a wasteful number, since it uses less digits than its factorization.

161536960836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888212 (or 888207 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 161536960836 in words is "one hundred sixty-one billion, five hundred thirty-six million, nine hundred sixty thousand, eight hundred thirty-six".