6494748640 has 48 divisors (see below), whose sum is σ = 15348680928. Its totient is φ = 2597080576.

The previous prime is 6494748619. The next prime is 6494748647. The reversal of 6494748640 is 468474946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6494748647) 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 7 ways as a sum of consecutive naturals, for example, 926589 + ... + 933571.

It is an arithmetic number, because the mean of its divisors is an integer number (319764186).

Almost surely, 2^6494748640 is an apocalyptic number.

It is an amenable number.

6494748640 is an abundant number, since it is smaller than the sum of its proper divisors (8853932288).

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

6494748640 is a wasteful number, since it uses less digits than its factorization.

6494748640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12811 (or 12803 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The square root of 6494748640 is about 80590.0033502915. The cubic root of 6494748640 is about 1865.7528594175.

The spelling of 6494748640 in words is "six billion, four hundred ninety-four million, seven hundred forty-eight thousand, six hundred forty".