1641663113 has 2 divisors, whose sum is σ = 1641663114. Its totient is φ = 1641663112.

The previous prime is 1641663109. The next prime is 1641663119. The reversal of 1641663113 is 3113661461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1432773904 + 208889209 = 37852^2 + 14453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641663113 - 2² = 1641663109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1641663113.

It is not a weakly prime, because it can be changed into another prime (1641663119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820831556 + 820831557.

It is an arithmetic number, because the mean of its divisors is an integer number (820831557).

Almost surely, 2^1641663113 is an apocalyptic number.

It is an amenable number.

1641663113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641663113 is an equidigital number, since it uses as much as digits as its factorization.

1641663113 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1641663113 is about 40517.4420836262. The cubic root of 1641663113 is about 1179.6722045060.

The spelling of 1641663113 in words is "one billion, six hundred forty-one million, six hundred sixty-three thousand, one hundred thirteen".