51004999993 has 2 divisors, whose sum is σ = 51004999994. Its totient is φ = 51004999992.

The previous prime is 51004999963. The next prime is 51005000009. The reversal of 51004999993 is 39999940015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31595773504 + 19409226489 = 177752^2 + 139317^2 .

It is a cyclic number.

It is not a de Polignac number, because 51004999993 - 2⁵ = 51004999961 is a prime.

It is not a weakly prime, because it can be changed into another prime (51004999963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25502499996 + 25502499997.

It is an arithmetic number, because the mean of its divisors is an integer number (25502499997).

Almost surely, 2^51004999993 is an apocalyptic number.

It is an amenable number.

51004999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

51004999993 is an equidigital number, since it uses as much as digits as its factorization.

51004999993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3542940, while the sum is 58.

The spelling of 51004999993 in words is "fifty-one billion, four million, nine hundred ninety-nine thousand, nine hundred ninety-three".