1636340347769 has 2 divisors, whose sum is σ = 1636340347770. Its totient is φ = 1636340347768.

The previous prime is 1636340347703. The next prime is 1636340347787. The reversal of 1636340347769 is 9677430436361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1244574516025 + 391765831744 = 1115605^2 + 625912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1636340347769 is a prime.

It is a super-2 number, since 2×1636340347769² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1636340347969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 818170173884 + 818170173885.

It is an arithmetic number, because the mean of its divisors is an integer number (818170173885).

Almost surely, 2^{1636340347769} is an apocalyptic number.

It is an amenable number.

1636340347769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1636340347769 is an equidigital number, since it uses as much as digits as its factorization.

1636340347769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41150592, while the sum is 59.

The spelling of 1636340347769 in words is "one trillion, six hundred thirty-six billion, three hundred forty million, three hundred forty-seven thousand, seven hundred sixty-nine".