51871717173 has 32 divisors (see below), whose sum is σ = 73766246400. Its totient is φ = 32351418176.

The previous prime is 51871717147. The next prime is 51871717207. The reversal of 51871717173 is 37171717815.

It is a cyclic number.

It is not a de Polignac number, because 51871717173 - 2⁸ = 51871716917 is a prime.

It is a super-2 number, since 2×51871717173² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51871717133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 769648 + ... + 834326.

It is an arithmetic number, because the mean of its divisors is an integer number (2305195200).

Almost surely, 2^51871717173 is an apocalyptic number.

It is an amenable number.

51871717173 is a deficient number, since it is larger than the sum of its proper divisors (21894529227).

51871717173 is a wasteful number, since it uses less digits than its factorization.

51871717173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64961.

The product of its digits is 288120, while the sum is 48.

The spelling of 51871717173 in words is "fifty-one billion, eight hundred seventy-one million, seven hundred seventeen thousand, one hundred seventy-three".