6465885646 has 32 divisors (see below), whose sum is σ = 10973944800. Its totient is φ = 2830289280.

The previous prime is 6465885637. The next prime is 6465885653.

6465885646 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235156 + ... + 261208.

It is an arithmetic number, because the mean of its divisors is an integer number (342935775).

Almost surely, 2^6465885646 is an apocalyptic number.

6465885646 is a deficient number, since it is larger than the sum of its proper divisors (4508059154).

6465885646 is a wasteful number, since it uses less digits than its factorization.

6465885646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26484.

The product of its digits is 33177600, while the sum is 58.

The square root of 6465885646 is about 80410.7309132307. The cubic root of 6465885646 is about 1862.9849214712.

The spelling of 6465885646 in words is "six billion, four hundred sixty-five million, eight hundred eighty-five thousand, six hundred forty-six".