11865256427 has 4 divisors (see below), whose sum is σ = 11902686576. Its totient is φ = 11827826280.

The previous prime is 11865256421. The next prime is 11865256453. The reversal of 11865256427 is 72465256811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11865256427 - 2⁴ = 11865256411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11865256421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18714599 + ... + 18715232.

It is an arithmetic number, because the mean of its divisors is an integer number (2975671644).

Almost surely, 2^11865256427 is an apocalyptic number.

11865256427 is a deficient number, since it is larger than the sum of its proper divisors (37430149).

11865256427 is an equidigital number, since it uses as much as digits as its factorization.

11865256427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37430148.

The product of its digits is 806400, while the sum is 47.

The spelling of 11865256427 in words is "eleven billion, eight hundred sixty-five million, two hundred fifty-six thousand, four hundred twenty-seven".