51426449539393 has 2 divisors, whose sum is σ = 51426449539394. Its totient is φ = 51426449539392.

The previous prime is 51426449539321. The next prime is 51426449539403. The reversal of 51426449539393 is 39393594462415.

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., 51426009043249 + 440496144 = 7171193^2 + 20988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51426449539393 is a prime.

It is not a weakly prime, because it can be changed into another prime (51426449539303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25713224769696 + 25713224769697.

It is an arithmetic number, because the mean of its divisors is an integer number (25713224769697).

Almost surely, 2^{51426449539393} is an apocalyptic number.

It is an amenable number.

51426449539393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51426449539393 is an equidigital number, since it uses as much as digits as its factorization.

51426449539393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 377913600, while the sum is 67.

The spelling of 51426449539393 in words is "fifty-one trillion, four hundred twenty-six billion, four hundred forty-nine million, five hundred thirty-nine thousand, three hundred ninety-three".