4665143440 has 20 divisors (see below), whose sum is σ = 10846458684. Its totient is φ = 1866057344.

The previous prime is 4665143423. The next prime is 4665143443. The reversal of 4665143440 is 443415664.

It can be written as a sum of positive squares in 2 ways, for example, as 2833645824 + 1831497616 = 53232^2 + 42796^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 4665143440.

It is not an unprimeable number, because it can be changed into a prime (4665143443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29157067 + ... + 29157226.

Almost surely, 2^4665143440 is an apocalyptic number.

4665143440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4665143440 is an abundant number, since it is smaller than the sum of its proper divisors (6181315244).

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

4665143440 is a wasteful number, since it uses less digits than its factorization.

4665143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58314306 (or 58314300 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 4665143440 is about 68301.8553188711. The cubic root of 4665143440 is about 1670.9174730809.

The spelling of 4665143440 in words is "four billion, six hundred sixty-five million, one hundred forty-three thousand, four hundred forty".