11728915127 has 2 divisors, whose sum is σ = 11728915128. Its totient is φ = 11728915126.

The previous prime is 11728915123. The next prime is 11728915129. The reversal of 11728915127 is 72151982711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11728915127 - 2² = 11728915123 is a prime.

It is a super-2 number, since 2×11728915127² (a number of 21 digits) contains 22 as substring.

Together with 11728915129, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11728915123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5864457563 + 5864457564.

It is an arithmetic number, because the mean of its divisors is an integer number (5864457564).

Almost surely, 2^11728915127 is an apocalyptic number.

11728915127 is a deficient number, since it is larger than the sum of its proper divisors (1).

11728915127 is an equidigital number, since it uses as much as digits as its factorization.

11728915127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 44.

The spelling of 11728915127 in words is "eleven billion, seven hundred twenty-eight million, nine hundred fifteen thousand, one hundred twenty-seven".