1641311011 has 2 divisors, whose sum is σ = 1641311012. Its totient is φ = 1641311010.

The previous prime is 1641310987. The next prime is 1641311051. The reversal of 1641311011 is 1101131461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641311011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1641311011.

It is not a weakly prime, because it can be changed into another prime (1641311051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820655505 + 820655506.

It is an arithmetic number, because the mean of its divisors is an integer number (820655506).

Almost surely, 2^1641311011 is an apocalyptic number.

1641311011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641311011 is an equidigital number, since it uses as much as digits as its factorization.

1641311011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1641311011 is about 40513.0967836328. The cubic root of 1641311011 is about 1179.5878602338.

Adding to 1641311011 its reverse (1101131461), we get a palindrome (2742442472).

The spelling of 1641311011 in words is "one billion, six hundred forty-one million, three hundred eleven thousand, eleven".