1640211413 has 2 divisors, whose sum is σ = 1640211414. Its totient is φ = 1640211412.

The previous prime is 1640211401. The next prime is 1640211421. The reversal of 1640211413 is 3141120461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1562383729 + 77827684 = 39527^2 + 8822^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640211413 - 2¹⁰ = 1640210389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640210413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820105706 + 820105707.

It is an arithmetic number, because the mean of its divisors is an integer number (820105707).

Almost surely, 2^1640211413 is an apocalyptic number.

It is an amenable number.

1640211413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640211413 is an equidigital number, since it uses as much as digits as its factorization.

1640211413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1640211413 is about 40499.5236144822. The cubic root of 1640211413 is about 1179.3243793518.

Adding to 1640211413 its reverse (3141120461), we get a palindrome (4781331874).

The spelling of 1640211413 in words is "one billion, six hundred forty million, two hundred eleven thousand, four hundred thirteen".