6464874832 has 40 divisors (see below), whose sum is σ = 13537336680. Its totient is φ = 2973143040.

The previous prime is 6464874809. The next prime is 6464874833. The reversal of 6464874832 is 2384784646.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1561514256 + 4903360576 = 39516^2 + 70024^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 6464874832.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464874833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3144 + ... + 113752.

It is an arithmetic number, because the mean of its divisors is an integer number (338433417).

Almost surely, 2^6464874832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6464874832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6768668340).

6464874832 is an abundant number, since it is smaller than the sum of its proper divisors (7072461848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6464874832 is a wasteful number, since it uses less digits than its factorization.

6464874832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110911 (or 110905 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 52.

The square root of 6464874832 is about 80404.4453497442. The cubic root of 6464874832 is about 1862.8878360663.

The spelling of 6464874832 in words is "six billion, four hundred sixty-four million, eight hundred seventy-four thousand, eight hundred thirty-two".