11915473693 has 2 divisors, whose sum is σ = 11915473694. Its totient is φ = 11915473692.

The previous prime is 11915473663. The next prime is 11915473721. The reversal of 11915473693 is 39637451911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7118803129 + 4796670564 = 84373^2 + 69258^2 .

It is a cyclic number.

It is not a de Polignac number, because 11915473693 - 2⁹ = 11915473181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11915473643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5957736846 + 5957736847.

It is an arithmetic number, because the mean of its divisors is an integer number (5957736847).

Almost surely, 2^11915473693 is an apocalyptic number.

It is an amenable number.

11915473693 is a deficient number, since it is larger than the sum of its proper divisors (1).

11915473693 is an equidigital number, since it uses as much as digits as its factorization.

11915473693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The spelling of 11915473693 in words is "eleven billion, nine hundred fifteen million, four hundred seventy-three thousand, six hundred ninety-three".