11537982217 has 2 divisors, whose sum is σ = 11537982218. Its totient is φ = 11537982216.

The previous prime is 11537982193. The next prime is 11537982227. The reversal of 11537982217 is 71228973511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10880367481 + 657614736 = 104309^2 + 25644^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11537982217 is a prime.

It is not a weakly prime, because it can be changed into another prime (11537982227) 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, 5768991108 + 5768991109.

It is an arithmetic number, because the mean of its divisors is an integer number (5768991109).

Almost surely, 2^11537982217 is an apocalyptic number.

It is an amenable number.

11537982217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11537982217 is an equidigital number, since it uses as much as digits as its factorization.

11537982217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 46.

The spelling of 11537982217 in words is "eleven billion, five hundred thirty-seven million, nine hundred eighty-two thousand, two hundred seventeen".