161091832812 has 24 divisors (see below), whose sum is σ = 376665676800. Its totient is φ = 53585172816.

The previous prime is 161091832801. The next prime is 161091832817. The reversal of 161091832812 is 218238190161.

It is not an unprimeable number, because it can be changed into a prime (161091832817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14007112 + ... + 14018607.

It is an arithmetic number, because the mean of its divisors is an integer number (15694403200).

Almost surely, 2^161091832812 is an apocalyptic number.

161091832812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161091832812 is an abundant number, since it is smaller than the sum of its proper divisors (215573843988).

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

161091832812 is a wasteful number, since it uses less digits than its factorization.

161091832812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28026205 (or 28026203 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The spelling of 161091832812 in words is "one hundred sixty-one billion, ninety-one million, eight hundred thirty-two thousand, eight hundred twelve".