634365343360019 has 2 divisors, whose sum is σ = 634365343360020. Its totient is φ = 634365343360018.

The previous prime is 634365343359961. The next prime is 634365343360109. The reversal of 634365343360019 is 910063343563436.

Together with next prime (634365343360109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634365343360019 - 2²⁴ = 634365326582803 is a prime.

It is a super-2 number, since 2×634365343360019² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (634365343360319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317182671680009 + 317182671680010.

It is an arithmetic number, because the mean of its divisors is an integer number (317182671680010).

Almost surely, 2^{634365343360019} is an apocalyptic number.

634365343360019 is a deficient number, since it is larger than the sum of its proper divisors (1).

634365343360019 is an equidigital number, since it uses as much as digits as its factorization.

634365343360019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37791360, while the sum is 56.

The spelling of 634365343360019 in words is "six hundred thirty-four trillion, three hundred sixty-five billion, three hundred forty-three million, three hundred sixty thousand, nineteen".