11810197449 has 24 divisors (see below), whose sum is σ = 18200568672. Its totient is φ = 7353740160.

The previous prime is 11810197417. The next prime is 11810197453. The reversal of 11810197449 is 94479101811.

11810197449 is a `hidden beast` number, since 1 + 1 + 8 + 10 + 197 + 449 = 666.

It is not a de Polignac number, because 11810197449 - 2⁵ = 11810197417 is a prime.

It is a super-2 number, since 2×11810197449² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11810197409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 274579 + ... + 314664.

It is an arithmetic number, because the mean of its divisors is an integer number (758357028).

Almost surely, 2^11810197449 is an apocalyptic number.

It is an amenable number.

11810197449 is a deficient number, since it is larger than the sum of its proper divisors (6390371223).

11810197449 is a wasteful number, since it uses less digits than its factorization.

11810197449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589397 (or 589394 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The spelling of 11810197449 in words is "eleven billion, eight hundred ten million, one hundred ninety-seven thousand, four hundred forty-nine".