6400842844 has 24 divisors (see below), whose sum is σ = 12222823536. Its totient is φ = 2908752000.

The previous prime is 6400842841. The next prime is 6400842853. The reversal of 6400842844 is 4482480046.

It is a super-2 number, since 2×6400842844² = 81941578227172016672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6400842797 and 6400842806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400842841) 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 7 ways as a sum of consecutive naturals, for example, 187584 + ... + 219064.

It is an arithmetic number, because the mean of its divisors is an integer number (509284314).

Almost surely, 2^6400842844 is an apocalyptic number.

It is an amenable number.

6400842844 is a deficient number, since it is larger than the sum of its proper divisors (5821980692).

6400842844 is a wasteful number, since it uses less digits than its factorization.

6400842844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36117 (or 36115 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 40.

The square root of 6400842844 is about 80005.2676015773. The cubic root of 6400842844 is about 1856.7170326863.

The spelling of 6400842844 in words is "six billion, four hundred million, eight hundred forty-two thousand, eight hundred forty-four".