51185305499 has 2 divisors, whose sum is σ = 51185305500. Its totient is φ = 51185305498.

The previous prime is 51185305453. The next prime is 51185305511. The reversal of 51185305499 is 99450358115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51185305499 - 2⁸ = 51185305243 is a prime.

It is not a weakly prime, because it can be changed into another prime (51185335499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25592652749 + 25592652750.

It is an arithmetic number, because the mean of its divisors is an integer number (25592652750).

Almost surely, 2^51185305499 is an apocalyptic number.

51185305499 is a deficient number, since it is larger than the sum of its proper divisors (1).

51185305499 is an equidigital number, since it uses as much as digits as its factorization.

51185305499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 51185305499 in words is "fifty-one billion, one hundred eighty-five million, three hundred five thousand, four hundred ninety-nine".