1851693866756 has 24 divisors (see below), whose sum is σ = 3242631364056. Its totient is φ = 925227964160.

The previous prime is 1851693866749. The next prime is 1851693866767. The reversal of 1851693866756 is 6576683961581.

It can be written as a sum of positive squares in 4 ways, for example, as 2273382400 + 1849420484356 = 47680^2 + 1359934^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1851693866756.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 42564536 + ... + 42608016.

It is an arithmetic number, because the mean of its divisors is an integer number (135109640169).

Almost surely, 2^{1851693866756} is an apocalyptic number.

It is an amenable number.

1851693866756 is a deficient number, since it is larger than the sum of its proper divisors (1390937497300).

1851693866756 is a wasteful number, since it uses less digits than its factorization.

1851693866756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50359 (or 50357 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 71.

The spelling of 1851693866756 in words is "one trillion, eight hundred fifty-one billion, six hundred ninety-three million, eight hundred sixty-six thousand, seven hundred fifty-six".