3161611643 has 2 divisors, whose sum is σ = 3161611644. Its totient is φ = 3161611642.

The previous prime is 3161611633. The next prime is 3161611693. The reversal of 3161611643 is 3461161613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3161611643 - 2⁴ = 3161611627 is a prime.

It is not a weakly prime, because it can be changed into another prime (3161611613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580805821 + 1580805822.

It is an arithmetic number, because the mean of its divisors is an integer number (1580805822).

Almost surely, 2^3161611643 is an apocalyptic number.

3161611643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3161611643 is an equidigital number, since it uses as much as digits as its factorization.

3161611643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 3161611643 is about 56228.2103841124. The cubic root of 3161611643 is about 1467.6962144586.

The spelling of 3161611643 in words is "three billion, one hundred sixty-one million, six hundred eleven thousand, six hundred forty-three".