161745087384 has 192 divisors, whose sum is σ = 488698992000. Its totient is φ = 49428532800.

The previous prime is 161745087373. The next prime is 161745087397. The reversal of 161745087384 is 483780547161.

161745087384 is a `hidden beast` number, since 1 + 61 + 7 + 4 + 508 + 73 + 8 + 4 = 666.

161745087384 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161745087384² (a number of 23 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 161745087384.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3923439 + ... + 3964449.

It is an arithmetic number, because the mean of its divisors is an integer number (2545307250).

Almost surely, 2^161745087384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161745087384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244349496000).

161745087384 is an abundant number, since it is smaller than the sum of its proper divisors (326953904616).

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

161745087384 is a wasteful number, since it uses less digits than its factorization.

161745087384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41107 (or 41066 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 161745087384 in words is "one hundred sixty-one billion, seven hundred forty-five million, eighty-seven thousand, three hundred eighty-four".