1964644159 has 2 divisors, whose sum is σ = 1964644160. Its totient is φ = 1964644158.

The previous prime is 1964644139. The next prime is 1964644163. The reversal of 1964644159 is 9514464691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1964644159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1964644139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982322079 + 982322080.

It is an arithmetic number, because the mean of its divisors is an integer number (982322080).

Almost surely, 2^1964644159 is an apocalyptic number.

1964644159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964644159 is an equidigital number, since it uses as much as digits as its factorization.

1964644159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 1964644159 is about 44324.3066386830. The cubic root of 1964644159 is about 1252.4526052214.

The spelling of 1964644159 in words is "one billion, nine hundred sixty-four million, six hundred forty-four thousand, one hundred fifty-nine".