6500644534 has 16 divisors (see below), whose sum is σ = 10297198080. Its totient is φ = 3069345960.

The previous prime is 6500644519. The next prime is 6500644559. The reversal of 6500644534 is 4354460056.

It is a junction number, because it is equal to n+sod(n) for n = 6500644493 and 6500644502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263214 + ... + 286849.

It is an arithmetic number, because the mean of its divisors is an integer number (643574880).

Almost surely, 2^6500644534 is an apocalyptic number.

6500644534 is a deficient number, since it is larger than the sum of its proper divisors (3796553546).

6500644534 is a wasteful number, since it uses less digits than its factorization.

6500644534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550395.

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 6500644534 is about 80626.5746140812. The cubic root of 6500644534 is about 1866.3172617633.

The spelling of 6500644534 in words is "six billion, five hundred million, six hundred forty-four thousand, five hundred thirty-four".