11644287781164 has 48 divisors (see below), whose sum is σ = 27984284748000. Its totient is φ = 3765704726016.

The previous prime is 11644287781151. The next prime is 11644287781169. The reversal of 11644287781164 is 46118778244611.

It is a junction number, because it is equal to n+sod(n) for n = 11644287781098 and 11644287781107.

It is not an unprimeable number, because it can be changed into a prime (11644287781169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37417929 + ... + 37727840.

It is an arithmetic number, because the mean of its divisors is an integer number (583005932250).

Almost surely, 2^{11644287781164} is an apocalyptic number.

It is an amenable number.

11644287781164 is an abundant number, since it is smaller than the sum of its proper divisors (16339996966836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11644287781164 is a wasteful number, since it uses less digits than its factorization.

11644287781164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75146162 (or 75146160 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 60.

The spelling of 11644287781164 in words is "eleven trillion, six hundred forty-four billion, two hundred eighty-seven million, seven hundred eighty-one thousand, one hundred sixty-four".