161853232920 has 64 divisors (see below), whose sum is σ = 485593920000. Its totient is φ = 43157820288.

The previous prime is 161853232913. The next prime is 161853232921. The reversal of 161853232920 is 29232358161.

161853232920 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161853232921) 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 15 ways as a sum of consecutive naturals, for example, 2044231 + ... + 2121929.

It is an arithmetic number, because the mean of its divisors is an integer number (7587405000).

Almost surely, 2^161853232920 is an apocalyptic number.

161853232920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161853232920 is an abundant number, since it is smaller than the sum of its proper divisors (323740687080).

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

161853232920 is a wasteful number, since it uses less digits than its factorization.

161853232920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95072 (or 95068 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 161853232920 in words is "one hundred sixty-one billion, eight hundred fifty-three million, two hundred thirty-two thousand, nine hundred twenty".