11919488257 has 2 divisors, whose sum is σ = 11919488258. Its totient is φ = 11919488256.

The previous prime is 11919488233. The next prime is 11919488263. The reversal of 11919488257 is 75288491911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11449856016 + 469632241 = 107004^2 + 21671^2 .

It is a cyclic number.

It is not a de Polignac number, because 11919488257 - 2³¹ = 9772004609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11919488198 and 11919488207.

It is not a weakly prime, because it can be changed into another prime (11919488657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5959744128 + 5959744129.

It is an arithmetic number, because the mean of its divisors is an integer number (5959744129).

Almost surely, 2^11919488257 is an apocalyptic number.

It is an amenable number.

11919488257 is a deficient number, since it is larger than the sum of its proper divisors (1).

11919488257 is an equidigital number, since it uses as much as digits as its factorization.

11919488257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 55.

The spelling of 11919488257 in words is "eleven billion, nine hundred nineteen million, four hundred eighty-eight thousand, two hundred fifty-seven".