11636390957 has 2 divisors, whose sum is σ = 11636390958. Its totient is φ = 11636390956.

The previous prime is 11636390947. The next prime is 11636390963. The reversal of 11636390957 is 75909363611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8377008676 + 3259382281 = 91526^2 + 57091^2 .

It is a cyclic number.

It is not a de Polignac number, because 11636390957 - 2³⁰ = 10562649133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11636390947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5818195478 + 5818195479.

It is an arithmetic number, because the mean of its divisors is an integer number (5818195479).

Almost surely, 2^11636390957 is an apocalyptic number.

It is an amenable number.

11636390957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11636390957 is an equidigital number, since it uses as much as digits as its factorization.

11636390957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 50.

The spelling of 11636390957 in words is "eleven billion, six hundred thirty-six million, three hundred ninety thousand, nine hundred fifty-seven".