11561415893 has 2 divisors, whose sum is σ = 11561415894. Its totient is φ = 11561415892.

The previous prime is 11561415883. The next prime is 11561415907. The reversal of 11561415893 is 39851416511.

11561415893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8187897169 + 3373518724 = 90487^2 + 58082^2 .

It is an emirp because it is prime and its reverse (39851416511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11561415893 - 2¹⁰ = 11561414869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11561415883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780707946 + 5780707947.

It is an arithmetic number, because the mean of its divisors is an integer number (5780707947).

Almost surely, 2^11561415893 is an apocalyptic number.

It is an amenable number.

11561415893 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561415893 is an equidigital number, since it uses as much as digits as its factorization.

11561415893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 44.

The spelling of 11561415893 in words is "eleven billion, five hundred sixty-one million, four hundred fifteen thousand, eight hundred ninety-three".