10581442561 has 4 divisors (see below), whose sum is σ = 10600237872. Its totient is φ = 10562647252.

The previous prime is 10581442519. The next prime is 10581442591. The reversal of 10581442561 is 16524418501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10581442561 - 2⁷ = 10581442433 is a prime.

It is a super-2 number, since 2×10581442561² (a number of 21 digits) contains 22 as substring.

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 10581442561.

It is not an unprimeable number, because it can be changed into a prime (10581442591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9396811 + ... + 9397936.

It is an arithmetic number, because the mean of its divisors is an integer number (2650059468).

It is a Proth number, since it is equal to 40365 ⋅ 2¹⁸ + 1 and 40365 < 2¹⁸.

Almost surely, 2^10581442561 is an apocalyptic number.

It is an amenable number.

10581442561 is a deficient number, since it is larger than the sum of its proper divisors (18795311).

10581442561 is an equidigital number, since it uses as much as digits as its factorization.

10581442561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18795310.

The product of its (nonzero) digits is 38400, while the sum is 37.

The spelling of 10581442561 in words is "ten billion, five hundred eighty-one million, four hundred forty-two thousand, five hundred sixty-one".