3958218549838 has 32 divisors (see below), whose sum is σ = 7168851993600. Its totient is φ = 1603034944224.

The previous prime is 3958218549829. The next prime is 3958218549841. The reversal of 3958218549838 is 8389458128593.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103696948 + ... + 103735111.

It is an arithmetic number, because the mean of its divisors is an integer number (224026624800).

Almost surely, 2^{3958218549838} is an apocalyptic number.

3958218549838 is a deficient number, since it is larger than the sum of its proper divisors (3210633443762).

3958218549838 is a wasteful number, since it uses less digits than its factorization.

3958218549838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207432144.

The product of its digits is 597196800, while the sum is 73.

The spelling of 3958218549838 in words is "three trillion, nine hundred fifty-eight billion, two hundred eighteen million, five hundred forty-nine thousand, eight hundred thirty-eight".