51698188951 has 4 divisors (see below), whose sum is σ = 51699207904. Its totient is φ = 51697170000.

The previous prime is 51698188943. The next prime is 51698188967. The reversal of 51698188951 is 15988189615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51698188951 - 2³ = 51698188943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51698188951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51698188921) 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 in 3 ways as a sum of consecutive naturals, for example, 429150 + ... + 536251.

It is an arithmetic number, because the mean of its divisors is an integer number (12924801976).

Almost surely, 2^51698188951 is an apocalyptic number.

51698188951 is a deficient number, since it is larger than the sum of its proper divisors (1018953).

51698188951 is an equidigital number, since it uses as much as digits as its factorization.

51698188951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018952.

The product of its digits is 6220800, while the sum is 61.

The spelling of 51698188951 in words is "fifty-one billion, six hundred ninety-eight million, one hundred eighty-eight thousand, nine hundred fifty-one".