51434965693 has 2 divisors, whose sum is σ = 51434965694. Its totient is φ = 51434965692.

The previous prime is 51434965691. The next prime is 51434965717. The reversal of 51434965693 is 39656943415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27948483684 + 23486482009 = 167178^2 + 153253^2 .

It is a cyclic number.

It is not a de Polignac number, because 51434965693 - 2¹ = 51434965691 is a prime.

Together with 51434965691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51434965691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25717482846 + 25717482847.

It is an arithmetic number, because the mean of its divisors is an integer number (25717482847).

Almost surely, 2^51434965693 is an apocalyptic number.

It is an amenable number.

51434965693 is a deficient number, since it is larger than the sum of its proper divisors (1).

51434965693 is an equidigital number, since it uses as much as digits as its factorization.

51434965693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10497600, while the sum is 55.

The spelling of 51434965693 in words is "fifty-one billion, four hundred thirty-four million, nine hundred sixty-five thousand, six hundred ninety-three".