163595171961 has 45 divisors (see below), whose sum is σ = 264704219901. Its totient is φ = 100644830208.

The previous prime is 163595171939. The next prime is 163595171963. The reversal of 163595171961 is 169171595361.

The square root of 163595171961 is 404469.

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

163595171961 is a `hidden beast` number, since 1 + 6 + 3 + 59 + 517 + 19 + 61 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 123890624361 + 39704547600 = 351981^2 + 199260^2 .

It is a de Polignac number, because none of the positive numbers 2^k-163595171961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163595171898 and 163595171907.

It is not an unprimeable number, because it can be changed into a prime (163595171963) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 47321145 + ... + 47324601.

Almost surely, 2^163595171961 is an apocalyptic number.

163595171961 is the 404469-th square number.

163595171961 is the 202235-th centered octagonal number.

It is an amenable number.

163595171961 is a deficient number, since it is larger than the sum of its proper divisors (101109047940).

163595171961 is an frugal number, since it uses more digits than its factorization.

163595171961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6952 (or 3473 counting only the distinct ones).

The product of its digits is 1530900, while the sum is 54.

The spelling of 163595171961 in words is "one hundred sixty-three billion, five hundred ninety-five million, one hundred seventy-one thousand, nine hundred sixty-one".