636245057710069 has 2 divisors, whose sum is σ = 636245057710070. Its totient is φ = 636245057710068.

The previous prime is 636245057710061. The next prime is 636245057710177. The reversal of 636245057710069 is 960017750542636.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456760759729444 + 179484297980625 = 21371962^2 + 13397175^2 .

It is a cyclic number.

It is not a de Polignac number, because 636245057710069 - 2³ = 636245057710061 is a prime.

It is a super-2 number, since 2×636245057710069² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636245057709989 and 636245057710016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636245057710061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318122528855034 + 318122528855035.

It is an arithmetic number, because the mean of its divisors is an integer number (318122528855035).

Almost surely, 2^{636245057710069} is an apocalyptic number.

It is an amenable number.

636245057710069 is a deficient number, since it is larger than the sum of its proper divisors (1).

636245057710069 is an equidigital number, since it uses as much as digits as its factorization.

636245057710069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57153600, while the sum is 61.

The spelling of 636245057710069 in words is "six hundred thirty-six trillion, two hundred forty-five billion, fifty-seven million, seven hundred ten thousand, sixty-nine".