11994398403849 has 9 divisors (see below), whose sum is σ = 17325257146509. Its totient is φ = 7996258675980.

The previous prime is 11994398403847. The next prime is 11994398403929. The reversal of 11994398403849 is 94830489349911.

The square root of 11994398403849 is 3463293.

It is a perfect power (a square), and thus also a powerful number.

11994398403849 is a `hidden beast` number, since 1 + 1 + 9 + 94 + 3 + 98 + 403 + 8 + 49 = 666.

11994398403849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 11994398403849 - 2¹ = 11994398403847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11994398403847) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9812664 + ... + 10967094.

Almost surely, 2^{11994398403849} is an apocalyptic number.

11994398403849 is the 3463293-rd square number.

11994398403849 is the 1731647-th centered octagonal number.

It is an amenable number.

11994398403849 is a deficient number, since it is larger than the sum of its proper divisors (5330858742660).

11994398403849 is an frugal number, since it uses more digits than its factorization.

11994398403849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308868 (or 1154434 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 72.

The spelling of 11994398403849 in words is "eleven trillion, nine hundred ninety-four billion, three hundred ninety-eight million, four hundred three thousand, eight hundred forty-nine".