51393738959 has 2 divisors, whose sum is σ = 51393738960. Its totient is φ = 51393738958.

The previous prime is 51393738943. The next prime is 51393738983. The reversal of 51393738959 is 95983739315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51393738959 - 2⁴ = 51393738943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51393738559) 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, 25696869479 + 25696869480.

It is an arithmetic number, because the mean of its divisors is an integer number (25696869480).

Almost surely, 2^51393738959 is an apocalyptic number.

51393738959 is a deficient number, since it is larger than the sum of its proper divisors (1).

51393738959 is an equidigital number, since it uses as much as digits as its factorization.

51393738959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27556200, while the sum is 62.

The spelling of 51393738959 in words is "fifty-one billion, three hundred ninety-three million, seven hundred thirty-eight thousand, nine hundred fifty-nine".