6499655424 has 432 divisors, whose sum is σ = 21075634944. Its totient is φ = 1916928000.

The previous prime is 6499655423. The next prime is 6499655471. The reversal of 6499655424 is 4245569946.

6499655424 is a `hidden beast` number, since 6 + 4 + 9 + 96 + 5 + 542 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499655423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64352974 + ... + 64353074.

It is an arithmetic number, because the mean of its divisors is an integer number (48786192).

Almost surely, 2^6499655424 is an apocalyptic number.

6499655424 is a gapful number since it is divisible by the number (64) 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 6499655424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10537817472).

6499655424 is an abundant number, since it is smaller than the sum of its proper divisors (14575979520).

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

6499655424 is a wasteful number, since it uses less digits than its factorization.

6499655424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 207 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The square root of 6499655424 is about 80620.4404850284. The cubic root of 6499655424 is about 1866.2226000370. Note that the first 3 decimals are identical.

The spelling of 6499655424 in words is "six billion, four hundred ninety-nine million, six hundred fifty-five thousand, four hundred twenty-four".