161838075500 has 48 divisors (see below), whose sum is σ = 353639508768. Its totient is φ = 64701320000.

The previous prime is 161838075491. The next prime is 161838075551. The reversal of 161838075500 is 5570838161.

161838075500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 881690 + ... + 1049310.

It is an arithmetic number, because the mean of its divisors is an integer number (7367489766).

Almost surely, 2^161838075500 is an apocalyptic number.

161838075500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161838075500 is an abundant number, since it is smaller than the sum of its proper divisors (191801433268).

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

161838075500 is a wasteful number, since it uses less digits than its factorization.

161838075500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169571 (or 169559 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 44.

The spelling of 161838075500 in words is "one hundred sixty-one billion, eight hundred thirty-eight million, seventy-five thousand, five hundred".