11046256561 has 4 divisors (see below), whose sum is σ = 11062670692. Its totient is φ = 11029842432.

The previous prime is 11046256547. The next prime is 11046256589. The reversal of 11046256561 is 16565264011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16565264011 = 347 ⋅47738513.

It can be written as a sum of positive squares in 2 ways, for example, as 3241594225 + 7804662336 = 56935^2 + 88344^2 .

It is a cyclic number.

It is not a de Polignac number, because 11046256561 - 2³¹ = 8898772913 is a prime.

It is a super-2 number, since 2×11046256561² (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 11046256561.

It is not an unprimeable number, because it can be changed into a prime (11046256591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8206056 + ... + 8207401.

It is an arithmetic number, because the mean of its divisors is an integer number (2765667673).

Almost surely, 2^11046256561 is an apocalyptic number.

It is an amenable number.

11046256561 is a deficient number, since it is larger than the sum of its proper divisors (16414131).

11046256561 is an equidigital number, since it uses as much as digits as its factorization.

11046256561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16414130.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 11046256561 in words is "eleven billion, forty-six million, two hundred fifty-six thousand, five hundred sixty-one".