6449036856 has 16 divisors (see below), whose sum is σ = 16122592200. Its totient is φ = 2149678944.

The previous prime is 6449036833. The next prime is 6449036863. The reversal of 6449036856 is 6586309446.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6449036799 and 6449036808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134354911 + ... + 134354958.

Almost surely, 2^6449036856 is an apocalyptic number.

It is an amenable number.

6449036856 is an abundant number, since it is smaller than the sum of its proper divisors (9673555344).

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

6449036856 is a wasteful number, since it uses less digits than its factorization.

6449036856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268709878 (or 268709874 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 51.

The square root of 6449036856 is about 80305.8955245504. The cubic root of 6449036856 is about 1861.3653265969.

The spelling of 6449036856 in words is "six billion, four hundred forty-nine million, thirty-six thousand, eight hundred fifty-six".