6464521634 has 16 divisors (see below), whose sum is σ = 10174921920. Its totient is φ = 3074451600.

The previous prime is 6464521627. The next prime is 6464521669. The reversal of 6464521634 is 4361254646.

It is a junction number, because it is equal to n+sod(n) for n = 6464521591 and 6464521600.

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, 384317 + ... + 400784.

It is an arithmetic number, because the mean of its divisors is an integer number (635932620).

Almost surely, 2^6464521634 is an apocalyptic number.

6464521634 is a deficient number, since it is larger than the sum of its proper divisors (3710400286).

6464521634 is a wasteful number, since it uses less digits than its factorization.

6464521634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785305.

The product of its digits is 414720, while the sum is 41.

The square root of 6464521634 is about 80402.2489362082. The cubic root of 6464521634 is about 1862.8539101586.

The spelling of 6464521634 in words is "six billion, four hundred sixty-four million, five hundred twenty-one thousand, six hundred thirty-four".