11644193481 has 8 divisors (see below), whose sum is σ = 15638917344. Its totient is φ = 7706132640.

The previous prime is 11644193441. The next prime is 11644193507. The reversal of 11644193481 is 18439144611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11644193481 - 2¹⁰ = 11644192457 is a prime.

It is a super-2 number, since 2×11644193481² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11644193441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14165275 + ... + 14166096.

It is an arithmetic number, because the mean of its divisors is an integer number (1954864668).

Almost surely, 2^11644193481 is an apocalyptic number.

It is an amenable number.

11644193481 is a deficient number, since it is larger than the sum of its proper divisors (3994723863).

11644193481 is a wasteful number, since it uses less digits than its factorization.

11644193481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28331511.

The product of its digits is 82944, while the sum is 42.

The spelling of 11644193481 in words is "eleven billion, six hundred forty-four million, one hundred ninety-three thousand, four hundred eighty-one".