6531642768 has 120 divisors (see below), whose sum is σ = 20661460320. Its totient is φ = 1767951360.

The previous prime is 6531642763. The next prime is 6531642773. The reversal of 6531642768 is 8672461356.

It is an interprime number because it is at equal distance from previous prime (6531642763) and next prime (6531642773).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (6531642763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28393 + ... + 117768.

It is an arithmetic number, because the mean of its divisors is an integer number (172178836).

Almost surely, 2^6531642768 is an apocalyptic number.

It is an amenable number.

6531642768 is an abundant number, since it is smaller than the sum of its proper divisors (14129817552).

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

6531642768 is a wasteful number, since it uses less digits than its factorization.

6531642768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146205 (or 146192 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 6531642768 is about 80818.5793490581. The cubic root of 6531642768 is about 1869.2790616990.

The spelling of 6531642768 in words is "six billion, five hundred thirty-one million, six hundred forty-two thousand, seven hundred sixty-eight".