11954603596849 has 9 divisors (see below), whose sum is σ = 11990165896107. Its totient is φ = 11919146493384.

The previous prime is 11954603596763. The next prime is 11954603596909. The reversal of 11954603596849 is 94869530645911.

The square root of 11954603596849 is 3457543.

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

It can be written as a sum of positive squares in only one way, i.e., 8774587369249 + 3180016227600 = 2962193^2 + 1783260^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11954603596849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11954603596349) 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, 1206677554 + ... + 1206687460.

It is an arithmetic number, because the mean of its divisors is an integer number (1332240655123).

Almost surely, 2^{11954603596849} is an apocalyptic number.

11954603596849 is the 3457543-rd square number.

11954603596849 is the 1728772-nd centered octagonal number.

It is an amenable number.

11954603596849 is a deficient number, since it is larger than the sum of its proper divisors (35562299258).

11954603596849 is an frugal number, since it uses more digits than its factorization.

11954603596849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20512 (or 10256 counting only the distinct ones).

The product of its (nonzero) digits is 251942400, while the sum is 70.

The spelling of 11954603596849 in words is "eleven trillion, nine hundred fifty-four billion, six hundred three million, five hundred ninety-six thousand, eight hundred forty-nine".