6231623640 has 128 divisors (see below), whose sum is σ = 20868883200. Its totient is φ = 1475550720.

The previous prime is 6231623633. The next prime is 6231623641. The reversal of 6231623640 is 463261326.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6231623641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1866 + ... + 111654.

It is an arithmetic number, because the mean of its divisors is an integer number (163038150).

Almost surely, 2^6231623640 is an apocalyptic number.

6231623640 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 6231623640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10434441600).

6231623640 is an abundant number, since it is smaller than the sum of its proper divisors (14637259560).

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

6231623640 is a wasteful number, since it uses less digits than its factorization.

6231623640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109857 (or 109853 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 6231623640 is about 78940.6336432638. The cubic root of 6231623640 is about 1840.2086680487.

Adding to 6231623640 its reverse (463261326), we get a palindrome (6694884966).

The spelling of 6231623640 in words is "six billion, two hundred thirty-one million, six hundred twenty-three thousand, six hundred forty".