10572561661 has 12 divisors (see below), whose sum is σ = 10834441632. Its totient is φ = 10316876136.

The previous prime is 10572561619. The next prime is 10572561667. The reversal of 10572561661 is 16616527501.

It is not a de Polignac number, because 10572561661 - 2¹⁹ = 10572037373 is a prime.

It is a super-2 number, since 2×10572561661² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10572561667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2636520 + ... + 2640526.

It is an arithmetic number, because the mean of its divisors is an integer number (902870136).

Almost surely, 2^10572561661 is an apocalyptic number.

It is an amenable number.

10572561661 is a deficient number, since it is larger than the sum of its proper divisors (261879971).

10572561661 is an equidigital number, since it uses as much as digits as its factorization.

10572561661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520 (or 5477 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 10572561661 in words is "ten billion, five hundred seventy-two million, five hundred sixty-one thousand, six hundred sixty-one".