11733413561 has 4 divisors (see below), whose sum is σ = 11761284324. Its totient is φ = 11705542800.

The previous prime is 11733413557. The next prime is 11733413563. The reversal of 11733413561 is 16531433711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16531433711 = 13 ⋅1271648747.

It can be written as a sum of positive squares in 2 ways, for example, as 6159895225 + 5573518336 = 78485^2 + 74656^2 .

It is a cyclic number.

It is not a de Polignac number, because 11733413561 - 2² = 11733413557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11733413563) 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, 13934750 + ... + 13935591.

It is an arithmetic number, because the mean of its divisors is an integer number (2940321081).

Almost surely, 2^11733413561 is an apocalyptic number.

It is an amenable number.

11733413561 is a deficient number, since it is larger than the sum of its proper divisors (27870763).

11733413561 is an equidigital number, since it uses as much as digits as its factorization.

11733413561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27870762.

The product of its digits is 22680, while the sum is 35.

The spelling of 11733413561 in words is "eleven billion, seven hundred thirty-three million, four hundred thirteen thousand, five hundred sixty-one".