51750171649 has 24 divisors (see below), whose sum is σ = 60475657536. Its totient is φ = 44150964000.

The previous prime is 51750171593. The next prime is 51750171721. The reversal of 51750171649 is 94617105715.

It is not a de Polignac number, because 51750171649 - 2⁷ = 51750171521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51750171599 and 51750171608.

It is not an unprimeable number, because it can be changed into a prime (51750171049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27927 + ... + 322924.

It is an arithmetic number, because the mean of its divisors is an integer number (2519819064).

Almost surely, 2^51750171649 is an apocalyptic number.

It is an amenable number.

51750171649 is a deficient number, since it is larger than the sum of its proper divisors (8725485887).

51750171649 is a wasteful number, since it uses less digits than its factorization.

51750171649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350949 (or 350938 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 46.

The spelling of 51750171649 in words is "fifty-one billion, seven hundred fifty million, one hundred seventy-one thousand, six hundred forty-nine".