864144796044 has 12 divisors (see below), whose sum is σ = 2016337857464. Its totient is φ = 288048265344.

The previous prime is 864144796013. The next prime is 864144796049. The reversal of 864144796044 is 440697441468.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (864144796049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36006033157 + ... + 36006033180.

Almost surely, 2^864144796044 is an apocalyptic number.

It is an amenable number.

864144796044 is an abundant number, since it is smaller than the sum of its proper divisors (1152193061420).

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

864144796044 is a wasteful number, since it uses less digits than its factorization.

864144796044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72012066344 (or 72012066342 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 57.

The spelling of 864144796044 in words is "eight hundred sixty-four billion, one hundred forty-four million, seven hundred ninety-six thousand, forty-four".