51701684999 has 2 divisors, whose sum is σ = 51701685000. Its totient is φ = 51701684998.

The previous prime is 51701684989. The next prime is 51701685097. The reversal of 51701684999 is 99948610715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51701684999 - 2³² = 47406717703 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51701684939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25850842499 + 25850842500.

It is an arithmetic number, because the mean of its divisors is an integer number (25850842500).

Almost surely, 2^51701684999 is an apocalyptic number.

51701684999 is a deficient number, since it is larger than the sum of its proper divisors (1).

51701684999 is an equidigital number, since it uses as much as digits as its factorization.

51701684999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 51701684999 in words is "fifty-one billion, seven hundred one million, six hundred eighty-four thousand, nine hundred ninety-nine".