161563075344 has 120 divisors (see below), whose sum is σ = 493389921024. Its totient is φ = 48945312000.

The previous prime is 161563075339. The next prime is 161563075361. The reversal of 161563075344 is 443570365161.

161563075344 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 630 + 7 + 5 + 3 + 4 + 4 = 666.

It is a super-2 number, since 2×161563075344² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161563075344.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6991329 + ... + 7014399.

Almost surely, 2^161563075344 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 161563075344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246694960512).

161563075344 is an abundant number, since it is smaller than the sum of its proper divisors (331826845680).

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

161563075344 is a wasteful number, since it uses less digits than its factorization.

161563075344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27517 (or 27508 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 161563075344 in words is "one hundred sixty-one billion, five hundred sixty-three million, seventy-five thousand, three hundred forty-four".