6499313680 has 160 divisors (see below), whose sum is σ = 16036973568. Its totient is φ = 2446080000.

The previous prime is 6499313677. The next prime is 6499313687. The reversal of 6499313680 is 863139946.

It is a super-2 number, since 2×6499313680² = 84482156622070284800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6499313687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25893555 + ... + 25893805.

Almost surely, 2^6499313680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6499313680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8018486784).

6499313680 is an abundant number, since it is smaller than the sum of its proper divisors (9537659888).

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

6499313680 is a wasteful number, since it uses less digits than its factorization.

6499313680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 6499313680 is about 80618.3209946722. The cubic root of 6499313680 is about 1866.1898915567.

The spelling of 6499313680 in words is "six billion, four hundred ninety-nine million, three hundred thirteen thousand, six hundred eighty".