161852311738368 has 480 divisors, whose sum is σ = 538819536855600. Its totient is φ = 48104695922688.

The previous prime is 161852311738357. The next prime is 161852311738373. The reversal of 161852311738368 is 863837113258161.

161852311738368 is a `hidden beast` number, since 1 + 6 + 1 + 8 + 5 + 231 + 1 + 7 + 38 + 368 = 666.

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, 52071496 + ... + 55092152.

Almost surely, 2^{161852311738368} is an apocalyptic number.

161852311738368 is a gapful number since it is divisible by the number (18) 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 161852311738368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269409768427800).

161852311738368 is an abundant number, since it is smaller than the sum of its proper divisors (376967225117232).

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

161852311738368 is a wasteful number, since it uses less digits than its factorization.

161852311738368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020727 (or 3020698 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 161852311738368 in words is "one hundred sixty-one trillion, eight hundred fifty-two billion, three hundred eleven million, seven hundred thirty-eight thousand, three hundred sixty-eight".