6440856030 has 192 divisors, whose sum is σ = 20077424640. Its totient is φ = 1401691392.

The previous prime is 6440856001. The next prime is 6440856043. The reversal of 6440856030 is 306580446.

6440856030 is a `hidden beast` number, since 6 + 4 + 40 + 8 + 5 + 603 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1092631 + ... + 1098509.

It is an arithmetic number, because the mean of its divisors is an integer number (104569920).

Almost surely, 2^6440856030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6440856030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10038712320).

6440856030 is an abundant number, since it is smaller than the sum of its proper divisors (13636568610).

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

6440856030 is a wasteful number, since it uses less digits than its factorization.

6440856030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983 (or 5980 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 6440856030 is about 80254.9439598583. The cubic root of 6440856030 is about 1860.5779248182.

The spelling of 6440856030 in words is "six billion, four hundred forty million, eight hundred fifty-six thousand, thirty".