6499476984 has 512 divisors, whose sum is σ = 23804928000. Its totient is φ = 1422489600.

The previous prime is 6499476979. The next prime is 6499477001. The reversal of 6499476984 is 4896749946.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13236979 + ... + 13237469.

It is an arithmetic number, because the mean of its divisors is an integer number (46494000).

Almost surely, 2^6499476984 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 6499476984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11902464000).

6499476984 is an abundant number, since it is smaller than the sum of its proper divisors (17305451016).

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

6499476984 is a wasteful number, since it uses less digits than its factorization.

6499476984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 575 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 66.

The square root of 6499476984 is about 80619.3338101972. Note that the first 3 decimals coincide. The cubic root of 6499476984 is about 1866.2055216031.

The spelling of 6499476984 in words is "six billion, four hundred ninety-nine million, four hundred seventy-six thousand, nine hundred eighty-four".