636464563741 has 2 divisors, whose sum is σ = 636464563742. Its totient is φ = 636464563740.

The previous prime is 636464563739. The next prime is 636464563771. The reversal of 636464563741 is 147365464636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586625787225 + 49838776516 = 765915^2 + 223246^2 .

It is a cyclic number.

It is not a de Polignac number, because 636464563741 - 2¹ = 636464563739 is a prime.

Together with 636464563739, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636464563771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318232281870 + 318232281871.

It is an arithmetic number, because the mean of its divisors is an integer number (318232281871).

Almost surely, 2^636464563741 is an apocalyptic number.

It is an amenable number.

636464563741 is a deficient number, since it is larger than the sum of its proper divisors (1).

636464563741 is an equidigital number, since it uses as much as digits as its factorization.

636464563741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 55.

The spelling of 636464563741 in words is "six hundred thirty-six billion, four hundred sixty-four million, five hundred sixty-three thousand, seven hundred forty-one".