3998541388636 has 24 divisors (see below), whose sum is σ = 7028202245120. Its totient is φ = 1990494896832.

The previous prime is 3998541388619. The next prime is 3998541388651. The reversal of 3998541388636 is 6368831458993.

It is a super-2 number, since 2×3998541388636² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6346 + ... + 2827918.

Almost surely, 2^{3998541388636} is an apocalyptic number.

It is an amenable number.

3998541388636 is a deficient number, since it is larger than the sum of its proper divisors (3029660856484).

3998541388636 is a wasteful number, since it uses less digits than its factorization.

3998541388636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823133 (or 2823131 counting only the distinct ones).

The product of its digits is 806215680, while the sum is 73.

The spelling of 3998541388636 in words is "three trillion, nine hundred ninety-eight billion, five hundred forty-one million, three hundred eighty-eight thousand, six hundred thirty-six".