63840338439 has 16 divisors (see below), whose sum is σ = 86130397440. Its totient is φ = 42057238400.

The previous prime is 63840338399. The next prime is 63840338453. The reversal of 63840338439 is 93483304836.

It is a happy number.

63840338439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 63840338439 - 2⁷ = 63840338311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63840338391 and 63840338400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63840338039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119259 + ... + 376700.

It is an arithmetic number, because the mean of its divisors is an integer number (5383149840).

Almost surely, 2^63840338439 is an apocalyptic number.

63840338439 is a deficient number, since it is larger than the sum of its proper divisors (22290059001).

63840338439 is a wasteful number, since it uses less digits than its factorization.

63840338439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496470.

The product of its (nonzero) digits is 4478976, while the sum is 51.

The spelling of 63840338439 in words is "sixty-three billion, eight hundred forty million, three hundred thirty-eight thousand, four hundred thirty-nine".