6480641865 has 8 divisors (see below), whose sum is σ = 10369027008. Its totient is φ = 3456342320.

The previous prime is 6480641819. The next prime is 6480641903. The reversal of 6480641865 is 5681460846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6480641865 - 2¹⁰ = 6480640841 is a prime.

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, 216021381 + ... + 216021410.

It is an arithmetic number, because the mean of its divisors is an integer number (1296128376).

Almost surely, 2^6480641865 is an apocalyptic number.

It is an amenable number.

6480641865 is a deficient number, since it is larger than the sum of its proper divisors (3888385143).

6480641865 is a wasteful number, since it uses less digits than its factorization.

6480641865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432042799.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 6480641865 is about 80502.4339073049. The cubic root of 6480641865 is about 1864.4010578299.

The spelling of 6480641865 in words is "six billion, four hundred eighty million, six hundred forty-one thousand, eight hundred sixty-five".