161753578596 has 81 divisors (see below), whose sum is σ = 434453678841. Its totient is φ = 50733350784.

The previous prime is 161753578559. The next prime is 161753578619. The reversal of 161753578596 is 695875357161.

The square root of 161753578596 is 402186.

It is a perfect power (a square), and thus also a powerful number.

161753578596 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 5 + 3 + 578 + 59 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 125932716900 + 35820861696 = 354870^2 + 189264^2 .

It is a super-2 number, since 2×161753578596² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 41021001 + ... + 41024943.

Almost surely, 2^161753578596 is an apocalyptic number.

161753578596 is the 402186-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161753578596

161753578596 is an abundant number, since it is smaller than the sum of its proper divisors (272700100245).

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

161753578596 is an equidigital number, since it uses as much as digits as its factorization.

161753578596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7930 (or 3965 counting only the distinct ones).

The product of its digits is 47628000, while the sum is 63.

The spelling of 161753578596 in words is "one hundred sixty-one billion, seven hundred fifty-three million, five hundred seventy-eight thousand, five hundred ninety-six".