6440049144 has 48 divisors (see below), whose sum is σ = 17529486000. Its totient is φ = 2135890944.

The previous prime is 6440049139. The next prime is 6440049193. The reversal of 6440049144 is 4419400446.

6440049144 is a `hidden beast` number, since 644 + 0 + 0 + 4 + 9 + 1 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6440049099 and 6440049108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210409 + ... + 239064.

It is an arithmetic number, because the mean of its divisors is an integer number (365197625).

Almost surely, 2^6440049144 is an apocalyptic number.

It is an amenable number.

6440049144 is an abundant number, since it is smaller than the sum of its proper divisors (11089436856).

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

6440049144 is a wasteful number, since it uses less digits than its factorization.

6440049144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449684 (or 449677 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 6440049144 is about 80249.9167850036. The cubic root of 6440049144 is about 1860.5002261930.

The spelling of 6440049144 in words is "six billion, four hundred forty million, forty-nine thousand, one hundred forty-four".