643425131053 has 2 divisors, whose sum is σ = 643425131054. Its totient is φ = 643425131052.

The previous prime is 643425131051. The next prime is 643425131087. The reversal of 643425131053 is 350131524346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586408287529 + 57016843524 = 765773^2 + 238782^2 .

It is a cyclic number.

It is not a de Polignac number, because 643425131053 - 2¹ = 643425131051 is a prime.

Together with 643425131051, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643425131051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321712565526 + 321712565527.

It is an arithmetic number, because the mean of its divisors is an integer number (321712565527).

Almost surely, 2^643425131053 is an apocalyptic number.

It is an amenable number.

643425131053 is a deficient number, since it is larger than the sum of its proper divisors (1).

643425131053 is an equidigital number, since it uses as much as digits as its factorization.

643425131053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 643425131053 its reverse (350131524346), we get a palindrome (993556655399).

The spelling of 643425131053 in words is "six hundred forty-three billion, four hundred twenty-five million, one hundred thirty-one thousand, fifty-three".