161843772384 has 240 divisors, whose sum is σ = 544535405568. Its totient is φ = 46193442048.

The previous prime is 161843772371. The next prime is 161843772397. The reversal of 161843772384 is 483277348161.

161843772384 is a `hidden beast` number, since 1 + 61 + 8 + 437 + 72 + 3 + 84 = 666.

It is an interprime number because it is at equal distance from previous prime (161843772371) and next prime (161843772397).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 161843772384.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20008789 + ... + 20016875.

Almost surely, 2^161843772384 is an apocalyptic number.

161843772384 is a gapful number since it is divisible by the number (14) 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 161843772384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272267702784).

161843772384 is an abundant number, since it is smaller than the sum of its proper divisors (382691633184).

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

161843772384 is a wasteful number, since it uses less digits than its factorization.

161843772384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9219 (or 9202 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 161843772384 in words is "one hundred sixty-one billion, eight hundred forty-three million, seven hundred seventy-two thousand, three hundred eighty-four".