6436397731823 has 2 divisors, whose sum is σ = 6436397731824. Its totient is φ = 6436397731822.

The previous prime is 6436397731733. The next prime is 6436397731943. The reversal of 6436397731823 is 3281377936346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6436397731823 - 2¹⁶ = 6436397666287 is a prime.

It is a super-4 number, since 4×6436397731823⁴ (a number of 52 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6436397721823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218198865911 + 3218198865912.

It is an arithmetic number, because the mean of its divisors is an integer number (3218198865912).

Almost surely, 2^{6436397731823} is an apocalyptic number.

6436397731823 is a deficient number, since it is larger than the sum of its proper divisors (1).

6436397731823 is an equidigital number, since it uses as much as digits as its factorization.

6436397731823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82301184, while the sum is 62.

The spelling of 6436397731823 in words is "six trillion, four hundred thirty-six billion, three hundred ninety-seven million, seven hundred thirty-one thousand, eight hundred twenty-three".