51294927799 has 2 divisors, whose sum is σ = 51294927800. Its totient is φ = 51294927798.

The previous prime is 51294927797. The next prime is 51294927811. The reversal of 51294927799 is 99772949215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51294927799 - 2¹ = 51294927797 is a prime.

Together with 51294927797, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51294927799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51294927797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25647463899 + 25647463900.

It is an arithmetic number, because the mean of its divisors is an integer number (25647463900).

Almost surely, 2^51294927799 is an apocalyptic number.

51294927799 is a deficient number, since it is larger than the sum of its proper divisors (1).

51294927799 is an equidigital number, since it uses as much as digits as its factorization.

51294927799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25719120, while the sum is 64.

The spelling of 51294927799 in words is "fifty-one billion, two hundred ninety-four million, nine hundred twenty-seven thousand, seven hundred ninety-nine".