6425636354321 has 2 divisors, whose sum is σ = 6425636354322. Its totient is φ = 6425636354320.

The previous prime is 6425636354261. The next prime is 6425636354323. The reversal of 6425636354321 is 1234536365246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5365889640721 + 1059746713600 = 2316439^2 + 1029440^2 .

It is a cyclic number.

It is not a de Polignac number, because 6425636354321 - 2³⁸ = 6150758447377 is a prime.

Together with 6425636354323, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6425636354321.

It is not a weakly prime, because it can be changed into another prime (6425636354323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212818177160 + 3212818177161.

It is an arithmetic number, because the mean of its divisors is an integer number (3212818177161).

Almost surely, 2^{6425636354321} is an apocalyptic number.

It is an amenable number.

6425636354321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425636354321 is an equidigital number, since it uses as much as digits as its factorization.

6425636354321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9331200, while the sum is 50.

The spelling of 6425636354321 in words is "six trillion, four hundred twenty-five billion, six hundred thirty-six million, three hundred fifty-four thousand, three hundred twenty-one".