162561445 has 8 divisors (see below), whose sum is σ = 196065144. Its totient is φ = 129388224.

The previous prime is 162561431. The next prime is 162561449. The reversal of 162561445 is 544165261.

It can be written as a sum of positive squares in 4 ways, for example, as 81974916 + 80586529 = 9054^2 + 8977^2 .

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 162561445 - 2⁹ = 162560933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 162561445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162561449) 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, 81534 + ... + 83503.

It is an arithmetic number, because the mean of its divisors is an integer number (24508143).

Almost surely, 2^162561445 is an apocalyptic number.

It is an amenable number.

162561445 is a deficient number, since it is larger than the sum of its proper divisors (33503699).

162561445 is a wasteful number, since it uses less digits than its factorization.

162561445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165239.

The product of its digits is 28800, while the sum is 34.

The square root of 162561445 is about 12749.9586273839. The cubic root of 162561445 is about 545.7652130024.

The spelling of 162561445 in words is "one hundred sixty-two million, five hundred sixty-one thousand, four hundred forty-five".