51638366375 has 16 divisors (see below), whose sum is σ = 64451244000. Its totient is φ = 41306486400.

The previous prime is 51638366369. The next prime is 51638366401. The reversal of 51638366375 is 57366383615.

It is not a de Polignac number, because 51638366375 - 2⁴ = 51638366359 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1939151 + ... + 1965599.

It is an arithmetic number, because the mean of its divisors is an integer number (4028202750).

Almost surely, 2^51638366375 is an apocalyptic number.

51638366375 is a deficient number, since it is larger than the sum of its proper divisors (12812877625).

51638366375 is a wasteful number, since it uses less digits than its factorization.

51638366375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42083 (or 42073 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 53.

The spelling of 51638366375 in words is "fifty-one billion, six hundred thirty-eight million, three hundred sixty-six thousand, three hundred seventy-five".