162746889561 has 27 divisors (see below), whose sum is σ = 243517046461. Its totient is φ = 104734027104.

The previous prime is 162746889559. The next prime is 162746889587. The reversal of 162746889561 is 165988647261.

The square root of 162746889561 is 403419.

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

162746889561 is a `hidden beast` number, since 1 + 6 + 2 + 7 + 4 + 68 + 8 + 9 + 561 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8882120025 + 153864769536 = 94245^2 + 392256^2 .

It is not a de Polignac number, because 162746889561 - 2¹ = 162746889559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162746889541) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 35095135 + ... + 35099771.

Almost surely, 2^162746889561 is an apocalyptic number.

162746889561 is the 403419-th square number.

162746889561 is the 201710-th centered octagonal number.

It is an amenable number.

162746889561 is a deficient number, since it is larger than the sum of its proper divisors (80770156900).

162746889561 is an frugal number, since it uses more digits than its factorization.

162746889561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9338 (or 4669 counting only the distinct ones).

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

The spelling of 162746889561 in words is "one hundred sixty-two billion, seven hundred forty-six million, eight hundred eighty-nine thousand, five hundred sixty-one".