6634383840 has 384 divisors, whose sum is σ = 27189872640. Its totient is φ = 1479168000.

The previous prime is 6634383829. The next prime is 6634383859. The reversal of 6634383840 is 483834366.

6634383840 is a `hidden beast` number, since 6 + 634 + 3 + 8 + 3 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1237165 + ... + 1242515.

It is an arithmetic number, because the mean of its divisors is an integer number (70806960).

Almost surely, 2^6634383840 is an apocalyptic number.

6634383840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6634383840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13594936320).

6634383840 is an abundant number, since it is smaller than the sum of its proper divisors (20555488800).

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

6634383840 is a wasteful number, since it uses less digits than its factorization.

6634383840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423 (or 5409 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The square root of 6634383840 is about 81451.7270535131. The cubic root of 6634383840 is about 1879.0292105777.

The spelling of 6634383840 in words is "six billion, six hundred thirty-four million, three hundred eighty-three thousand, eight hundred forty".