4638012509 has 6 divisors (see below), whose sum is σ = 5022226746. Its totient is φ = 4281242160.

The previous prime is 4638012503. The next prime is 4638012521. The reversal of 4638012509 is 9052108364.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 84732025 + 4553280484 = 9205^2 + 67478^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4638012509 is a prime.

It is a super-2 number, since 2×4638012509² = 43022320067280950162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4638012503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13721762 + ... + 13722099.

It is an arithmetic number, because the mean of its divisors is an integer number (837037791).

Almost surely, 2^4638012509 is an apocalyptic number.

It is an amenable number.

4638012509 is a deficient number, since it is larger than the sum of its proper divisors (384214237).

4638012509 is a wasteful number, since it uses less digits than its factorization.

4638012509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27443887 (or 27443874 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 4638012509 is about 68102.9552148804. The cubic root of 4638012509 is about 1667.6720056453.

The spelling of 4638012509 in words is "four billion, six hundred thirty-eight million, twelve thousand, five hundred nine".