3958218549839 has 8 divisors (see below), whose sum is σ = 3979002292992. Its totient is φ = 3937435432960.

The previous prime is 3958218549829. The next prime is 3958218549841. The reversal of 3958218549839 is 9389458128593.

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-3958218549839 is a prime.

It is a super-2 number, since 2×3958218549839² (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 (3958218549829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18065327 + ... + 18283119.

It is an arithmetic number, because the mean of its divisors is an integer number (497375286624).

Almost surely, 2^{3958218549839} is an apocalyptic number.

3958218549839 is a deficient number, since it is larger than the sum of its proper divisors (20783743153).

3958218549839 is a wasteful number, since it uses less digits than its factorization.

3958218549839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313137.

The product of its digits is 671846400, while the sum is 74.

The spelling of 3958218549839 in words is "three trillion, nine hundred fifty-eight billion, two hundred eighteen million, five hundred forty-nine thousand, eight hundred thirty-nine".