51118634611393 has 2 divisors, whose sum is σ = 51118634611394. Its totient is φ = 51118634611392.

The previous prime is 51118634611357. The next prime is 51118634611477. The reversal of 51118634611393 is 39311643681115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49637759795649 + 1480874815744 = 7045407^2 + 1216912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51118634611393 is a prime.

It is a super-2 number, since 2×51118634611393² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51118634611393.

It is not a weakly prime, because it can be changed into another prime (51118634611493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25559317305696 + 25559317305697.

It is an arithmetic number, because the mean of its divisors is an integer number (25559317305697).

Almost surely, 2^{51118634611393} is an apocalyptic number.

It is an amenable number.

51118634611393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51118634611393 is an equidigital number, since it uses as much as digits as its factorization.

51118634611393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The spelling of 51118634611393 in words is "fifty-one trillion, one hundred eighteen billion, six hundred thirty-four million, six hundred eleven thousand, three hundred ninety-three".