1113843419561 has 2 divisors, whose sum is σ = 1113843419562. Its totient is φ = 1113843419560.

The previous prime is 1113843419543. The next prime is 1113843419573. The reversal of 1113843419561 is 1659143483111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060630157161 + 53213262400 = 1029869^2 + 230680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113843419561 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1113843415561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556921709780 + 556921709781.

It is an arithmetic number, because the mean of its divisors is an integer number (556921709781).

Almost surely, 2^{1113843419561} is an apocalyptic number.

It is an amenable number.

1113843419561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113843419561 is an equidigital number, since it uses as much as digits as its factorization.

1113843419561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The spelling of 1113843419561 in words is "one trillion, one hundred thirteen billion, eight hundred forty-three million, four hundred nineteen thousand, five hundred sixty-one".