51659785745378 has 16 divisors (see below), whose sum is σ = 81954661359840. Its totient is φ = 24354451245600.

The previous prime is 51659785745377. The next prime is 51659785745419. The reversal of 51659785745378 is 87354758795615.

It is not an unprimeable number, because it can be changed into a prime (51659785745377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3221480243 + ... + 3221496278.

It is an arithmetic number, because the mean of its divisors is an integer number (5122166334990).

Almost surely, 2^{51659785745378} is an apocalyptic number.

51659785745378 is a deficient number, since it is larger than the sum of its proper divisors (30294875614462).

51659785745378 is a wasteful number, since it uses less digits than its factorization.

51659785745378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442976753.

The product of its digits is 8890560000, while the sum is 80.

The spelling of 51659785745378 in words is "fifty-one trillion, six hundred fifty-nine billion, seven hundred eighty-five million, seven hundred forty-five thousand, three hundred seventy-eight".