6321032640 has 672 divisors, whose sum is σ = 25085161920. Its totient is φ = 1513893888.

The previous prime is 6321032623. The next prime is 6321032687. The reversal of 6321032640 is 462301236.

6321032640 is a `hidden beast` number, since 6 + 3 + 2 + 10 + 3 + 2 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 170838702 + ... + 170838738.

It is an arithmetic number, because the mean of its divisors is an integer number (37329110).

Almost surely, 2^6321032640 is an apocalyptic number.

6321032640 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 6321032640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12542580960).

6321032640 is an abundant number, since it is smaller than the sum of its proper divisors (18764129280).

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

6321032640 is an equidigital number, since it uses as much as digits as its factorization.

6321032640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6321032640 is about 79504.9221117787. The cubic root of 6321032640 is about 1848.9677845384.

Adding to 6321032640 its reverse (462301236), we get a palindrome (6783333876).

The spelling of 6321032640 in words is "six billion, three hundred twenty-one million, thirty-two thousand, six hundred forty".