11995709449 has 4 divisors (see below), whose sum is σ = 12031305364. Its totient is φ = 11960113536.

The previous prime is 11995709393. The next prime is 11995709477. The reversal of 11995709449 is 94490759911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94490759911 = 61 ⋅1549028851.

It can be written as a sum of positive squares in 2 ways, for example, as 4126777600 + 7868931849 = 64240^2 + 88707^2 .

It is a cyclic number.

It is not a de Polignac number, because 11995709449 - 2²¹ = 11993612297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11995709393 and 11995709402.

It is not an unprimeable number, because it can be changed into a prime (11995709249) 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, 17797452 + ... + 17798125.

It is an arithmetic number, because the mean of its divisors is an integer number (3007826341).

Almost surely, 2^11995709449 is an apocalyptic number.

It is an amenable number.

11995709449 is a deficient number, since it is larger than the sum of its proper divisors (35595915).

11995709449 is an equidigital number, since it uses as much as digits as its factorization.

11995709449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35595914.

The product of its (nonzero) digits is 3674160, while the sum is 58.

The spelling of 11995709449 in words is "eleven billion, nine hundred ninety-five million, seven hundred nine thousand, four hundred forty-nine".