51604135207 has 2 divisors, whose sum is σ = 51604135208. Its totient is φ = 51604135206.

The previous prime is 51604135199. The next prime is 51604135217. The reversal of 51604135207 is 70253140615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51604135207 - 2³ = 51604135199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51604135217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25802067603 + 25802067604.

It is an arithmetic number, because the mean of its divisors is an integer number (25802067604).

Almost surely, 2^51604135207 is an apocalyptic number.

51604135207 is a deficient number, since it is larger than the sum of its proper divisors (1).

51604135207 is an equidigital number, since it uses as much as digits as its factorization.

51604135207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 51604135207 in words is "fifty-one billion, six hundred four million, one hundred thirty-five thousand, two hundred seven".