6501678732 has 144 divisors (see below), whose sum is σ = 18194319360. Its totient is φ = 2005581600.

The previous prime is 6501678731. The next prime is 6501678779. The reversal of 6501678732 is 2378761056.

6501678732 is a `hidden beast` number, since 6 + 501 + 6 + 78 + 73 + 2 = 666.

It is a super-2 number, since 2×6501678732² = 84543652668282255648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6501678731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1769257 + ... + 1772927.

It is an arithmetic number, because the mean of its divisors is an integer number (126349440).

Almost surely, 2^6501678732 is an apocalyptic number.

6501678732 is a gapful number since it is divisible by the number (62) 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 6501678732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9097159680).

6501678732 is an abundant number, since it is smaller than the sum of its proper divisors (11692640628).

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

6501678732 is a wasteful number, since it uses less digits than its factorization.

6501678732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761 (or 3730 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 6501678732 is about 80632.9878647691. The cubic root of 6501678732 is about 1866.4162283208.

The spelling of 6501678732 in words is "six billion, five hundred one million, six hundred seventy-eight thousand, seven hundred thirty-two".