6499723776 has 480 divisors, whose sum is σ = 22165545600. Its totient is φ = 1690730496.

The previous prime is 6499723759. The next prime is 6499723787. The reversal of 6499723776 is 6773279946.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

Its product of digits (24004512) is a multiple of the sum of its prime divisors (98).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89037276 + ... + 89037348.

It is an arithmetic number, because the mean of its divisors is an integer number (46178220).

Almost surely, 2^6499723776 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 6499723776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11082772800).

6499723776 is an abundant number, since it is smaller than the sum of its proper divisors (15665821824).

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

6499723776 is an equidigital number, since it uses as much as digits as its factorization.

6499723776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 98 counting only the distinct ones).

The product of its digits is 24004512, while the sum is 60.

The square root of 6499723776 is about 80620.8643962591. The cubic root of 6499723776 is about 1866.2291419018.

The spelling of 6499723776 in words is "six billion, four hundred ninety-nine million, seven hundred twenty-three thousand, seven hundred seventy-six".