6494048640 has 448 divisors, whose sum is σ = 24080976000. Its totient is φ = 1672151040.

The previous prime is 6494048591. The next prime is 6494048651. The reversal of 6494048640 is 468404946.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 14463136 + ... + 14463584.

Almost surely, 2^6494048640 is an apocalyptic number.

6494048640 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 6494048640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12040488000).

6494048640 is an abundant number, since it is smaller than the sum of its proper divisors (17586927360).

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

6494048640 is an equidigital number, since it uses as much as digits as its factorization.

6494048640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 6494048640 is about 80585.6602628532. The cubic root of 6494048640 is about 1865.6858271120.

The spelling of 6494048640 in words is "six billion, four hundred ninety-four million, forty-eight thousand, six hundred forty".