161235005136 has 20 divisors (see below), whose sum is σ = 416523763392. Its totient is φ = 53745001696.

The previous prime is 161235005131. The next prime is 161235005137. The reversal of 161235005136 is 631500532161.

161235005136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161235005097 and 161235005106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161235005131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679531256 + ... + 1679531351.

Almost surely, 2^161235005136 is an apocalyptic number.

161235005136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161235005136 is an abundant number, since it is smaller than the sum of its proper divisors (255288758256).

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

161235005136 is a wasteful number, since it uses less digits than its factorization.

161235005136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359062618 (or 3359062612 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

Adding to 161235005136 its reverse (631500532161), we get a palindrome (792735537297).

The spelling of 161235005136 in words is "one hundred sixty-one billion, two hundred thirty-five million, five thousand, one hundred thirty-six".