51395610439 has 2 divisors, whose sum is σ = 51395610440. Its totient is φ = 51395610438.

The previous prime is 51395610433. The next prime is 51395610449. The reversal of 51395610439 is 93401659315.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51395610439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51395610433) 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, 25697805219 + 25697805220.

It is an arithmetic number, because the mean of its divisors is an integer number (25697805220).

Almost surely, 2^51395610439 is an apocalyptic number.

51395610439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51395610439 is an equidigital number, since it uses as much as digits as its factorization.

51395610439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 46.

The spelling of 51395610439 in words is "fifty-one billion, three hundred ninety-five million, six hundred ten thousand, four hundred thirty-nine".