864181144 has 32 divisors (see below), whose sum is σ = 1650787200. Its totient is φ = 424005120.

The previous prime is 864181127. The next prime is 864181147. The reversal of 864181144 is 441181468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864181147) 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, 231904 + ... + 235600.

It is an arithmetic number, because the mean of its divisors is an integer number (51587100).

Almost surely, 2^864181144 is an apocalyptic number.

It is an amenable number.

864181144 is a deficient number, since it is larger than the sum of its proper divisors (786606056).

864181144 is a wasteful number, since it uses less digits than its factorization.

864181144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243 (or 4239 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 864181144 is about 29396.9580739232. The cubic root of 864181144 is about 952.5071886075.

The spelling of 864181144 in words is "eight hundred sixty-four million, one hundred eighty-one thousand, one hundred forty-four".