51393986107 has 2 divisors, whose sum is σ = 51393986108. Its totient is φ = 51393986106.

The previous prime is 51393986099. The next prime is 51393986177. The reversal of 51393986107 is 70168939315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51393986107 - 2³ = 51393986099 is a prime.

It is not a weakly prime, because it can be changed into another prime (51393986177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25696993053 + 25696993054.

It is an arithmetic number, because the mean of its divisors is an integer number (25696993054).

Almost surely, 2^51393986107 is an apocalyptic number.

51393986107 is a deficient number, since it is larger than the sum of its proper divisors (1).

51393986107 is an equidigital number, since it uses as much as digits as its factorization.

51393986107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 51393986107 in words is "fifty-one billion, three hundred ninety-three million, nine hundred eighty-six thousand, one hundred seven".