572448661 has 4 divisors (see below), whose sum is σ = 592188300. Its totient is φ = 552709024.

The previous prime is 572448659. The next prime is 572448671. The reversal of 572448661 is 166844275.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259371025 + 313077636 = 16105^2 + 17694^2 .

It is a cyclic number.

It is not a de Polignac number, because 572448661 - 2¹ = 572448659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (572448671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9869776 + ... + 9869833.

It is an arithmetic number, because the mean of its divisors is an integer number (148047075).

Almost surely, 2^572448661 is an apocalyptic number.

It is an amenable number.

572448661 is a deficient number, since it is larger than the sum of its proper divisors (19739639).

572448661 is a wasteful number, since it uses less digits than its factorization.

572448661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19739638.

The product of its digits is 322560, while the sum is 43.

The square root of 572448661 is about 23925.8993770349. The cubic root of 572448661 is about 830.3200299722.

The spelling of 572448661 in words is "five hundred seventy-two million, four hundred forty-eight thousand, six hundred sixty-one".