11523850649 has 2 divisors, whose sum is σ = 11523850650. Its totient is φ = 11523850648.

The previous prime is 11523850589. The next prime is 11523850687. The reversal of 11523850649 is 94605832511.

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., 10917115225 + 606735424 = 104485^2 + 24632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11523850649 is a prime.

It is not a weakly prime, because it can be changed into another prime (11523850699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5761925324 + 5761925325.

It is an arithmetic number, because the mean of its divisors is an integer number (5761925325).

Almost surely, 2^11523850649 is an apocalyptic number.

It is an amenable number.

11523850649 is a deficient number, since it is larger than the sum of its proper divisors (1).

11523850649 is an equidigital number, since it uses as much as digits as its factorization.

11523850649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 11523850649 in words is "eleven billion, five hundred twenty-three million, eight hundred fifty thousand, six hundred forty-nine".