51698188907 has 2 divisors, whose sum is σ = 51698188908. Its totient is φ = 51698188906.

The previous prime is 51698188879. The next prime is 51698188921. The reversal of 51698188907 is 70988189615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51698188907 - 2¹⁴ = 51698172523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51698188907.

It is not a weakly prime, because it can be changed into another prime (51698188967) 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, 25849094453 + 25849094454.

It is an arithmetic number, because the mean of its divisors is an integer number (25849094454).

Almost surely, 2^51698188907 is an apocalyptic number.

51698188907 is a deficient number, since it is larger than the sum of its proper divisors (1).

51698188907 is an equidigital number, since it uses as much as digits as its factorization.

51698188907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 62.

The spelling of 51698188907 in words is "fifty-one billion, six hundred ninety-eight million, one hundred eighty-eight thousand, nine hundred seven".