11527138639 has 2 divisors, whose sum is σ = 11527138640. Its totient is φ = 11527138638.

The previous prime is 11527138559. The next prime is 11527138697. The reversal of 11527138639 is 93683172511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11527138639 - 2¹¹ = 11527136591 is a prime.

It is a super-3 number, since 3×11527138639³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11527138339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5763569319 + 5763569320.

It is an arithmetic number, because the mean of its divisors is an integer number (5763569320).

Almost surely, 2^11527138639 is an apocalyptic number.

11527138639 is a deficient number, since it is larger than the sum of its proper divisors (1).

11527138639 is an equidigital number, since it uses as much as digits as its factorization.

11527138639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The spelling of 11527138639 in words is "eleven billion, five hundred twenty-seven million, one hundred thirty-eight thousand, six hundred thirty-nine".