11638479532709 has 2 divisors, whose sum is σ = 11638479532710. Its totient is φ = 11638479532708.

The previous prime is 11638479532697. The next prime is 11638479532733. The reversal of 11638479532709 is 90723597483611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10170856315684 + 1467623217025 = 3189178^2 + 1211455^2 .

It is an emirp because it is prime and its reverse (90723597483611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11638479532709 - 2⁸ = 11638479532453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11638479532769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819239766354 + 5819239766355.

It is an arithmetic number, because the mean of its divisors is an integer number (5819239766355).

It is a 2-persistent number, because it is pandigital, and so is 2⋅11638479532709 = 23276959065418, but 3⋅11638479532709 = 34915438598127 is not.

Almost surely, 2^{11638479532709} is an apocalyptic number.

It is an amenable number.

11638479532709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638479532709 is an equidigital number, since it uses as much as digits as its factorization.

11638479532709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68584320, while the sum is 65.

The spelling of 11638479532709 in words is "eleven trillion, six hundred thirty-eight billion, four hundred seventy-nine million, five hundred thirty-two thousand, seven hundred nine".