6436630452 has 72 divisors (see below), whose sum is σ = 17451190848. Its totient is φ = 1808801280.

The previous prime is 6436630439. The next prime is 6436630463. The reversal of 6436630452 is 2540366346.

It is a super-2 number, since 2×6436630452² = 82860423151227448608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6436630452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 302268 + ... + 322860.

Almost surely, 2^6436630452 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 6436630452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8725595424).

6436630452 is an abundant number, since it is smaller than the sum of its proper divisors (11014560396).

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

6436630452 is a wasteful number, since it uses less digits than its factorization.

6436630452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20729 (or 20666 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 39.

The square root of 6436630452 is about 80228.6136736763. The cubic root of 6436630452 is about 1860.1709531853.

Adding to 6436630452 its reverse (2540366346), we get a palindrome (8976996798).

The spelling of 6436630452 in words is "six billion, four hundred thirty-six million, six hundred thirty thousand, four hundred fifty-two".