161884142472 has 256 divisors, whose sum is σ = 477346867200. Its totient is φ = 45274890240.

The previous prime is 161884142411. The next prime is 161884142501. The reversal of 161884142472 is 274241488161.

161884142472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63 ways as a sum of consecutive naturals, for example, 133018408 + ... + 133019624.

It is an arithmetic number, because the mean of its divisors is an integer number (1864636200).

Almost surely, 2^161884142472 is an apocalyptic number.

161884142472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161884142472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238673433600).

161884142472 is an abundant number, since it is smaller than the sum of its proper divisors (315462724728).

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

161884142472 is a wasteful number, since it uses less digits than its factorization.

161884142472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096 (or 2092 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The spelling of 161884142472 in words is "one hundred sixty-one billion, eight hundred eighty-four million, one hundred forty-two thousand, four hundred seventy-two".