3111838643 has 4 divisors (see below), whose sum is σ = 3113872728. Its totient is φ = 3109804560.

The previous prime is 3111838637. The next prime is 3111838669. The reversal of 3111838643 is 3468381113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3468381113 = 8543 ⋅405991.

It is a cyclic number.

It is not a de Polignac number, because 3111838643 - 2⁶ = 3111838579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3111838597 and 3111838606.

It is not an unprimeable number, because it can be changed into a prime (3111838603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014746 + ... + 1017807.

It is an arithmetic number, because the mean of its divisors is an integer number (778468182).

Almost surely, 2^3111838643 is an apocalyptic number.

3111838643 is a deficient number, since it is larger than the sum of its proper divisors (2034085).

3111838643 is a wasteful number, since it uses less digits than its factorization.

3111838643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034084.

The product of its digits is 41472, while the sum is 38.

The square root of 3111838643 is about 55783.8564729976. The cubic root of 3111838643 is about 1459.9534987066.

The spelling of 3111838643 in words is "three billion, one hundred eleven million, eight hundred thirty-eight thousand, six hundred forty-three".