11384548561 has 2 divisors, whose sum is σ = 11384548562. Its totient is φ = 11384548560.

The previous prime is 11384548507. The next prime is 11384548583. The reversal of 11384548561 is 16584548311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9071419536 + 2313129025 = 95244^2 + 48095^2 .

It is an emirp because it is prime and its reverse (16584548311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11384548561 is a prime.

It is not a weakly prime, because it can be changed into another prime (11384548261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5692274280 + 5692274281.

It is an arithmetic number, because the mean of its divisors is an integer number (5692274281).

Almost surely, 2^11384548561 is an apocalyptic number.

It is an amenable number.

11384548561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11384548561 is an equidigital number, since it uses as much as digits as its factorization.

11384548561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 46.

The spelling of 11384548561 in words is "eleven billion, three hundred eighty-four million, five hundred forty-eight thousand, five hundred sixty-one".