10956964561 has 4 divisors (see below), whose sum is σ = 10957307812. Its totient is φ = 10956621312.

The previous prime is 10956964519. The next prime is 10956964573. The reversal of 10956964561 is 16546965901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16546965901 = 137 ⋅120780773.

It can be written as a sum of positive squares in 2 ways, for example, as 2327483536 + 8629481025 = 48244^2 + 92895^2 .

It is a cyclic number.

It is not a de Polignac number, because 10956964561 - 2⁷ = 10956964433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10956964499 and 10956964508.

It is not an unprimeable number, because it can be changed into a prime (10951964561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118200 + ... + 189433.

It is an arithmetic number, because the mean of its divisors is an integer number (2739326953).

Almost surely, 2^10956964561 is an apocalyptic number.

It is an amenable number.

10956964561 is a deficient number, since it is larger than the sum of its proper divisors (343251).

10956964561 is an equidigital number, since it uses as much as digits as its factorization.

10956964561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343250.

The product of its (nonzero) digits is 1749600, while the sum is 52.

The spelling of 10956964561 in words is "ten billion, nine hundred fifty-six million, nine hundred sixty-four thousand, five hundred sixty-one".