6402127661393 has 2 divisors, whose sum is σ = 6402127661394. Its totient is φ = 6402127661392.

The previous prime is 6402127661389. The next prime is 6402127661407. The reversal of 6402127661393 is 3931667212046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3256552286464 + 3145575374929 = 1804592^2 + 1773577^2 .

It is a cyclic number.

It is not a de Polignac number, because 6402127661393 - 2² = 6402127661389 is a prime.

It is not a weakly prime, because it can be changed into another prime (6402127664393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201063830696 + 3201063830697.

It is an arithmetic number, because the mean of its divisors is an integer number (3201063830697).

Almost surely, 2^{6402127661393} is an apocalyptic number.

It is an amenable number.

6402127661393 is a deficient number, since it is larger than the sum of its proper divisors (1).

6402127661393 is an equidigital number, since it uses as much as digits as its factorization.

6402127661393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 6402127661393 in words is "six trillion, four hundred two billion, one hundred twenty-seven million, six hundred sixty-one thousand, three hundred ninety-three".