6511281056 has 24 divisors (see below), whose sum is σ = 14650382880. Its totient is φ = 2790548928.

The previous prime is 6511281031. The next prime is 6511281059. The reversal of 6511281056 is 6501821156.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6511281059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14533886 + ... + 14534333.

It is an arithmetic number, because the mean of its divisors is an integer number (610432620).

Almost surely, 2^6511281056 is an apocalyptic number.

It is an amenable number.

6511281056 is an abundant number, since it is smaller than the sum of its proper divisors (8139101824).

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

6511281056 is a wasteful number, since it uses less digits than its factorization.

6511281056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29068236 (or 29068228 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 6511281056 is about 80692.5092929945. The cubic root of 6511281056 is about 1867.3346125490.

The spelling of 6511281056 in words is "six billion, five hundred eleven million, two hundred eighty-one thousand, fifty-six".