534381685661 has 2 divisors, whose sum is σ = 534381685662. Its totient is φ = 534381685660.

The previous prime is 534381685639. The next prime is 534381685699. The reversal of 534381685661 is 166586183435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 514727328025 + 19654357636 = 717445^2 + 140194^2 .

It is a cyclic number.

It is not a de Polignac number, because 534381685661 - 2⁶ = 534381685597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 534381685597 and 534381685606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (536381685661) 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, 267190842830 + 267190842831.

It is an arithmetic number, because the mean of its divisors is an integer number (267190842831).

Almost surely, 2^534381685661 is an apocalyptic number.

It is an amenable number.

534381685661 is a deficient number, since it is larger than the sum of its proper divisors (1).

534381685661 is an equidigital number, since it uses as much as digits as its factorization.

534381685661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12441600, while the sum is 56.

The spelling of 534381685661 in words is "five hundred thirty-four billion, three hundred eighty-one million, six hundred eighty-five thousand, six hundred sixty-one".