162724561 has 8 divisors (see below), whose sum is σ = 173174760. Its totient is φ = 152371968.

The previous prime is 162724559. The next prime is 162724579. The reversal of 162724561 is 165427261.

It can be written as a sum of positive squares in 4 ways, for example, as 106998336 + 55726225 = 10344^2 + 7465^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 162724561 - 2¹ = 162724559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162724501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20946 + ... + 27643.

It is an arithmetic number, because the mean of its divisors is an integer number (21646845).

Almost surely, 2^162724561 is an apocalyptic number.

It is an amenable number.

162724561 is a deficient number, since it is larger than the sum of its proper divisors (10450199).

162724561 is a wasteful number, since it uses less digits than its factorization.

162724561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48803.

The product of its digits is 20160, while the sum is 34.

The square root of 162724561 is about 12756.3537501905. The cubic root of 162724561 is about 545.9476943190.

The spelling of 162724561 in words is "one hundred sixty-two million, seven hundred twenty-four thousand, five hundred sixty-one".