11975838849 has 16 divisors (see below), whose sum is σ = 19106752000. Its totient is φ = 7369746768.

The previous prime is 11975838779. The next prime is 11975838859. The reversal of 11975838849 is 94883857911.

11975838849 is a `hidden beast` number, since 1 + 1 + 9 + 7 + 583 + 8 + 8 + 49 = 666.

It is not a de Polignac number, because 11975838849 - 2¹² = 11975834753 is a prime.

It is a super-2 number, since 2×11975838849² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11975838859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17059249 + ... + 17059950.

It is an arithmetic number, because the mean of its divisors is an integer number (1194172000).

Almost surely, 2^11975838849 is an apocalyptic number.

It is an amenable number.

11975838849 is a deficient number, since it is larger than the sum of its proper divisors (7130913151).

11975838849 is a wasteful number, since it uses less digits than its factorization.

11975838849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34119221 (or 34119215 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 63.

The spelling of 11975838849 in words is "eleven billion, nine hundred seventy-five million, eight hundred thirty-eight thousand, eight hundred forty-nine".