636740070481 has 2 divisors, whose sum is σ = 636740070482. Its totient is φ = 636740070480.

The previous prime is 636740070479. The next prime is 636740070557. The reversal of 636740070481 is 184070047636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 576771897025 + 59968173456 = 759455^2 + 244884^2 .

It is a cyclic number.

It is not a de Polignac number, because 636740070481 - 2¹ = 636740070479 is a prime.

It is a super-2 number, since 2×636740070481² (a number of 24 digits) contains 22 as substring.

Together with 636740070479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (636740070451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318370035240 + 318370035241.

It is an arithmetic number, because the mean of its divisors is an integer number (318370035241).

Almost surely, 2^636740070481 is an apocalyptic number.

It is an amenable number.

636740070481 is a deficient number, since it is larger than the sum of its proper divisors (1).

636740070481 is an equidigital number, since it uses as much as digits as its factorization.

636740070481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 636740070481 in words is "six hundred thirty-six billion, seven hundred forty million, seventy thousand, four hundred eighty-one".