51033136426693 has 2 divisors, whose sum is σ = 51033136426694. Its totient is φ = 51033136426692.

The previous prime is 51033136426669. The next prime is 51033136426721. The reversal of 51033136426693 is 39662463133015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50012646529444 + 1020489897249 = 7071962^2 + 1010193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51033136426693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51033136426693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51033136426633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25516568213346 + 25516568213347.

It is an arithmetic number, because the mean of its divisors is an integer number (25516568213347).

Almost surely, 2^{51033136426693} is an apocalyptic number.

It is an amenable number.

51033136426693 is a deficient number, since it is larger than the sum of its proper divisors (1).

51033136426693 is an equidigital number, since it uses as much as digits as its factorization.

51033136426693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6298560, while the sum is 52.

The spelling of 51033136426693 in words is "fifty-one trillion, thirty-three billion, one hundred thirty-six million, four hundred twenty-six thousand, six hundred ninety-three".