11811893773 has 2 divisors, whose sum is σ = 11811893774. Its totient is φ = 11811893772.

The previous prime is 11811893741. The next prime is 11811893791. The reversal of 11811893773 is 37739811811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7370737609 + 4441156164 = 85853^2 + 66642^2 .

It is a cyclic number.

It is not a de Polignac number, because 11811893773 - 2⁵ = 11811893741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11811890773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5905946886 + 5905946887.

It is an arithmetic number, because the mean of its divisors is an integer number (5905946887).

Almost surely, 2^11811893773 is an apocalyptic number.

It is an amenable number.

11811893773 is a deficient number, since it is larger than the sum of its proper divisors (1).

11811893773 is an equidigital number, since it uses as much as digits as its factorization.

11811893773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 49.

The spelling of 11811893773 in words is "eleven billion, eight hundred eleven million, eight hundred ninety-three thousand, seven hundred seventy-three".