11854984609 has 4 divisors (see below), whose sum is σ = 12766906516. Its totient is φ = 10943062704.

The previous prime is 11854984607. The next prime is 11854984649. The reversal of 11854984609 is 90648945811.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2509509025 + 9345475584 = 50095^2 + 96672^2 .

It is a cyclic number.

It is not a de Polignac number, because 11854984609 - 2¹ = 11854984607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11854984609.

It is not an unprimeable number, because it can be changed into a prime (11854984607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455960934 + ... + 455960959.

It is an arithmetic number, because the mean of its divisors is an integer number (3191726629).

Almost surely, 2^11854984609 is an apocalyptic number.

It is an amenable number.

11854984609 is a deficient number, since it is larger than the sum of its proper divisors (911921907).

11854984609 is an equidigital number, since it uses as much as digits as its factorization.

11854984609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911921906.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 11854984609 in words is "eleven billion, eight hundred fifty-four million, nine hundred eighty-four thousand, six hundred nine".