51839705459 has 2 divisors, whose sum is σ = 51839705460. Its totient is φ = 51839705458.

The previous prime is 51839705443. The next prime is 51839705473. The reversal of 51839705459 is 95450793815.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51839705459 - 2⁴ = 51839705443 is a prime.

It is not a weakly prime, because it can be changed into another prime (51839735459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25919852729 + 25919852730.

It is an arithmetic number, because the mean of its divisors is an integer number (25919852730).

Almost surely, 2^51839705459 is an apocalyptic number.

51839705459 is a deficient number, since it is larger than the sum of its proper divisors (1).

51839705459 is an equidigital number, since it uses as much as digits as its factorization.

51839705459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804000, while the sum is 56.

The spelling of 51839705459 in words is "fifty-one billion, eight hundred thirty-nine million, seven hundred five thousand, four hundred fifty-nine".