11719810549 has 2 divisors, whose sum is σ = 11719810550. Its totient is φ = 11719810548.

The previous prime is 11719810541. The next prime is 11719810567. The reversal of 11719810549 is 94501891711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7683749649 + 4036060900 = 87657^2 + 63530^2 .

It is a cyclic number.

It is not a de Polignac number, because 11719810549 - 2³ = 11719810541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11719810499 and 11719810508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11719810541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859905274 + 5859905275.

It is an arithmetic number, because the mean of its divisors is an integer number (5859905275).

Almost surely, 2^11719810549 is an apocalyptic number.

It is an amenable number.

11719810549 is a deficient number, since it is larger than the sum of its proper divisors (1).

11719810549 is an equidigital number, since it uses as much as digits as its factorization.

11719810549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 46.

The spelling of 11719810549 in words is "eleven billion, seven hundred nineteen million, eight hundred ten thousand, five hundred forty-nine".