6532881064 has 8 divisors (see below), whose sum is σ = 12249152010. Its totient is φ = 3266440528.

The previous prime is 6532881059. The next prime is 6532881067. The reversal of 6532881064 is 4601882356.

It can be written as a sum of positive squares in only one way, i.e., 5134868964 + 1398012100 = 71658^2 + 37390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 6532881064.

It is not an unprimeable number, because it can be changed into a prime (6532881067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408305059 + ... + 408305074.

Almost surely, 2^6532881064 is an apocalyptic number.

It is an amenable number.

6532881064 is a deficient number, since it is larger than the sum of its proper divisors (5716270946).

6532881064 is a wasteful number, since it uses less digits than its factorization.

6532881064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816610139 (or 816610135 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 6532881064 is about 80826.2399471855. The cubic root of 6532881064 is about 1869.3971828009.

The spelling of 6532881064 in words is "six billion, five hundred thirty-two million, eight hundred eighty-one thousand, sixty-four".