3118440643 has 2 divisors, whose sum is σ = 3118440644. Its totient is φ = 3118440642.

The previous prime is 3118440617. The next prime is 3118440709. The reversal of 3118440643 is 3460448113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3118440643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3118440599 and 3118440608.

It is not a weakly prime, because it can be changed into another prime (3118449643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1559220321 + 1559220322.

It is an arithmetic number, because the mean of its divisors is an integer number (1559220322).

Almost surely, 2^3118440643 is an apocalyptic number.

3118440643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3118440643 is an equidigital number, since it uses as much as digits as its factorization.

3118440643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 3118440643 is about 55842.9999462780. Note that the first 4 decimals coincide. The cubic root of 3118440643 is about 1460.9852365073.

Adding to 3118440643 its reverse (3460448113), we get a palindrome (6578888756).

The spelling of 3118440643 in words is "three billion, one hundred eighteen million, four hundred forty thousand, six hundred forty-three".