6331616240 has 80 divisors (see below), whose sum is σ = 15510986400. Its totient is φ = 2396998656.

The previous prime is 6331616209. The next prime is 6331616243. The reversal of 6331616240 is 426161336.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 6331616197 and 6331616206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6331616243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3083054 + ... + 3085106.

It is an arithmetic number, because the mean of its divisors is an integer number (193887330).

Almost surely, 2^6331616240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6331616240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7755493200).

6331616240 is an abundant number, since it is smaller than the sum of its proper divisors (9179370160).

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

6331616240 is a wasteful number, since it uses less digits than its factorization.

6331616240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4114 (or 4108 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 6331616240 is about 79571.4536752974. The cubic root of 6331616240 is about 1849.9991468221. Note that the first 3 decimals are identical.

Adding to 6331616240 its reverse (426161336), we get a palindrome (6757777576).

The spelling of 6331616240 in words is "six billion, three hundred thirty-one million, six hundred sixteen thousand, two hundred forty".