11638479532157 has 2 divisors, whose sum is σ = 11638479532158. Its totient is φ = 11638479532156.

The previous prime is 11638479532103. The next prime is 11638479532171. The reversal of 11638479532157 is 75123597483611.

11638479532157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7904228610916 + 3734250921241 = 2811446^2 + 1932421^2 .

It is a cyclic number.

It is not a de Polignac number, because 11638479532157 - 2¹² = 11638479528061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11638479532157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11638479532177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819239766078 + 5819239766079.

It is an arithmetic number, because the mean of its divisors is an integer number (5819239766079).

Almost surely, 2^{11638479532157} is an apocalyptic number.

It is an amenable number.

11638479532157 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638479532157 is an equidigital number, since it uses as much as digits as its factorization.

11638479532157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38102400, while the sum is 62.

The spelling of 11638479532157 in words is "eleven trillion, six hundred thirty-eight billion, four hundred seventy-nine million, five hundred thirty-two thousand, one hundred fifty-seven".