6520655044 has 12 divisors (see below), whose sum is σ = 11412873724. Its totient is φ = 3259833984.

The previous prime is 6520655039. The next prime is 6520655069. The reversal of 6520655044 is 4405560256.

It can be written as a sum of positive squares in 2 ways, for example, as 1928966400 + 4591688644 = 43920^2 + 67762^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6520654994 and 6520655012.

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 3 ways as a sum of consecutive naturals, for example, 92817 + ... + 147160.

Almost surely, 2^6520655044 is an apocalyptic number.

It is an amenable number.

6520655044 is a deficient number, since it is larger than the sum of its proper divisors (4892218680).

6520655044 is a wasteful number, since it uses less digits than its factorization.

6520655044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246774 (or 246772 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 6520655044 is about 80750.5730258306. The cubic root of 6520655044 is about 1868.2302877489.

The spelling of 6520655044 in words is "six billion, five hundred twenty million, six hundred fifty-five thousand, forty-four".