51354128788693 has 2 divisors, whose sum is σ = 51354128788694. Its totient is φ = 51354128788692.

The previous prime is 51354128788663. The next prime is 51354128788709. The reversal of 51354128788693 is 39688782145315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49483599353764 + 1870529434929 = 7034458^2 + 1367673^2 .

It is a cyclic number.

It is not a de Polignac number, because 51354128788693 - 2⁴¹ = 49155105533141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51354128788663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677064394346 + 25677064394347.

It is an arithmetic number, because the mean of its divisors is an integer number (25677064394347).

Almost surely, 2^{51354128788693} is an apocalyptic number.

It is an amenable number.

51354128788693 is a deficient number, since it is larger than the sum of its proper divisors (1).

51354128788693 is an equidigital number, since it uses as much as digits as its factorization.

51354128788693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 348364800, while the sum is 70.

The spelling of 51354128788693 in words is "fifty-one trillion, three hundred fifty-four billion, one hundred twenty-eight million, seven hundred eighty-eight thousand, six hundred ninety-three".