51678127149765 has 32 divisors (see below), whose sum is σ = 87037827696000. Its totient is φ = 26110759127040.

The previous prime is 51678127149749. The next prime is 51678127149799. The reversal of 51678127149765 is 56794172187615.

It is not a de Polignac number, because 51678127149765 - 2⁴ = 51678127149749 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51678127149765.

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 31 ways as a sum of consecutive naturals, for example, 25485505 + ... + 27438425.

It is an arithmetic number, because the mean of its divisors is an integer number (2719932115500).

Almost surely, 2^{51678127149765} is an apocalyptic number.

It is an amenable number.

51678127149765 is a deficient number, since it is larger than the sum of its proper divisors (35359700546235).

51678127149765 is a wasteful number, since it uses less digits than its factorization.

51678127149765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045797.

The product of its digits is 177811200, while the sum is 69.

The spelling of 51678127149765 in words is "fifty-one trillion, six hundred seventy-eight billion, one hundred twenty-seven million, one hundred forty-nine thousand, seven hundred sixty-five".