6490744680 has 128 divisors (see below), whose sum is σ = 22278758400. Its totient is φ = 1481947392.

The previous prime is 6490744657. The next prime is 6490744709. The reversal of 6490744680 is 864470946.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 852169 + ... + 859751.

It is an arithmetic number, because the mean of its divisors is an integer number (174052800).

Almost surely, 2^6490744680 is an apocalyptic number.

6490744680 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 6490744680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11139379200).

6490744680 is an abundant number, since it is smaller than the sum of its proper divisors (15788013720).

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

6490744680 is a wasteful number, since it uses less digits than its factorization.

6490744680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8623 (or 8619 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 6490744680 is about 80565.1579778753. The cubic root of 6490744680 is about 1865.3693734195.

The spelling of 6490744680 in words is "six billion, four hundred ninety million, seven hundred forty-four thousand, six hundred eighty".