11851455449 has 16 divisors (see below), whose sum is σ = 12456333120. Its totient is φ = 11263069440.

The previous prime is 11851455439. The next prime is 11851455467. The reversal of 11851455449 is 94455415811.

It is a cyclic number.

It is not a de Polignac number, because 11851455449 - 2²⁰ = 11850406873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11851455419) 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 15 ways as a sum of consecutive naturals, for example, 659309 + ... + 677045.

It is an arithmetic number, because the mean of its divisors is an integer number (778520820).

Almost surely, 2^11851455449 is an apocalyptic number.

It is an amenable number.

11851455449 is a deficient number, since it is larger than the sum of its proper divisors (604877671).

11851455449 is a wasteful number, since it uses less digits than its factorization.

11851455449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18200.

The product of its digits is 576000, while the sum is 47.

The spelling of 11851455449 in words is "eleven billion, eight hundred fifty-one million, four hundred fifty-five thousand, four hundred forty-nine".