6436243811 has 2 divisors, whose sum is σ = 6436243812. Its totient is φ = 6436243810.

The previous prime is 6436243799. The next prime is 6436243829. The reversal of 6436243811 is 1183426346.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6436243811 is a prime.

It is not a weakly prime, because it can be changed into another prime (6436243831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218121905 + 3218121906.

It is an arithmetic number, because the mean of its divisors is an integer number (3218121906).

Almost surely, 2^6436243811 is an apocalyptic number.

6436243811 is a deficient number, since it is larger than the sum of its proper divisors (1).

6436243811 is an equidigital number, since it uses as much as digits as its factorization.

6436243811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The square root of 6436243811 is about 80226.2040171414. The cubic root of 6436243811 is about 1860.1337063285.

The spelling of 6436243811 in words is "six billion, four hundred thirty-six million, two hundred forty-three thousand, eight hundred eleven".