5218535306639 has 8 divisors (see below), whose sum is σ = 5493227773440. Its totient is φ = 4943846111256.

The previous prime is 5218535306629. The next prime is 5218535306641. The reversal of 5218535306639 is 9366035358125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5218535306639 is a prime.

It is a super-2 number, since 2×5218535306639² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218535306609) 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, 2886824 + ... + 4332530.

It is an arithmetic number, because the mean of its divisors is an integer number (686653471680).

Almost surely, 2^{5218535306639} is an apocalyptic number.

5218535306639 is a deficient number, since it is larger than the sum of its proper divisors (274692466801).

5218535306639 is a wasteful number, since it uses less digits than its factorization.

5218535306639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635709.

The product of its (nonzero) digits is 17496000, while the sum is 56.

The spelling of 5218535306639 in words is "five trillion, two hundred eighteen billion, five hundred thirty-five million, three hundred six thousand, six hundred thirty-nine".