51299329439 has 2 divisors, whose sum is σ = 51299329440. Its totient is φ = 51299329438.

The previous prime is 51299329427. The next prime is 51299329541. The reversal of 51299329439 is 93492399215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51299329439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51299328439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25649664719 + 25649664720.

It is an arithmetic number, because the mean of its divisors is an integer number (25649664720).

Almost surely, 2^51299329439 is an apocalyptic number.

51299329439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51299329439 is an equidigital number, since it uses as much as digits as its factorization.

51299329439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4723920, while the sum is 56.

The spelling of 51299329439 in words is "fifty-one billion, two hundred ninety-nine million, three hundred twenty-nine thousand, four hundred thirty-nine".