11956864027 has 6 divisors (see below), whose sum is σ = 12619294548. Its totient is φ = 11327555052.

The previous prime is 11956864013. The next prime is 11956864057. The reversal of 11956864027 is 72046865911.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11956864027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11956864057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16560393 + ... + 16561114.

It is an arithmetic number, because the mean of its divisors is an integer number (2103215758).

Almost surely, 2^11956864027 is an apocalyptic number.

11956864027 is a deficient number, since it is larger than the sum of its proper divisors (662430521).

11956864027 is an equidigital number, since it uses as much as digits as its factorization.

11956864027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33121545 (or 33121526 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 11956864027 in words is "eleven billion, nine hundred fifty-six million, eight hundred sixty-four thousand, twenty-seven".