11324548561 has 2 divisors, whose sum is σ = 11324548562. Its totient is φ = 11324548560.

The previous prime is 11324548463. The next prime is 11324548579. The reversal of 11324548561 is 16584542311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8249180625 + 3075367936 = 90825^2 + 55456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11324548561 is a prime.

It is a super-2 number, since 2×11324548561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11324543561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5662274280 + 5662274281.

It is an arithmetic number, because the mean of its divisors is an integer number (5662274281).

Almost surely, 2^11324548561 is an apocalyptic number.

It is an amenable number.

11324548561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11324548561 is an equidigital number, since it uses as much as digits as its factorization.

11324548561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The spelling of 11324548561 in words is "eleven billion, three hundred twenty-four million, five hundred forty-eight thousand, five hundred sixty-one".