6436268440 has 32 divisors (see below), whose sum is σ = 16550405280. Its totient is φ = 2206720512.

The previous prime is 6436268401. The next prime is 6436268441. The reversal of 6436268440 is 448626346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6436268441) 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, 11493057 + ... + 11493616.

It is an arithmetic number, because the mean of its divisors is an integer number (517200165).

Almost surely, 2^6436268440 is an apocalyptic number.

It is an amenable number.

6436268440 is an abundant number, since it is smaller than the sum of its proper divisors (10114136840).

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

6436268440 is a wasteful number, since it uses less digits than its factorization.

6436268440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22986691 (or 22986687 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 43.

The square root of 6436268440 is about 80226.3575142235. The cubic root of 6436268440 is about 1860.1360789947.

The spelling of 6436268440 in words is "six billion, four hundred thirty-six million, two hundred sixty-eight thousand, four hundred forty".