6499879256 has 48 divisors (see below), whose sum is σ = 13211157960. Its totient is φ = 2996697600.

The previous prime is 6499879249. The next prime is 6499879259. The reversal of 6499879256 is 6529789946.

It is a super-2 number, since 2×6499879256² = 84496860685158227072, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6499879192 and 6499879201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499879259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1621751 + ... + 1625753.

Almost surely, 2^6499879256 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 6499879256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6605578980).

6499879256 is an abundant number, since it is smaller than the sum of its proper divisors (6711278704).

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

6499879256 is a wasteful number, since it uses less digits than its factorization.

6499879256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236 (or 5219 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 65.

The square root of 6499879256 is about 80621.8286570083. The cubic root of 6499879256 is about 1866.2440224825.

The spelling of 6499879256 in words is "six billion, four hundred ninety-nine million, eight hundred seventy-nine thousand, two hundred fifty-six".