1853561942666 has 16 divisors (see below), whose sum is σ = 3177862673856. Its totient is φ = 794301710976.

The previous prime is 1853561942647. The next prime is 1853561942689. The reversal of 1853561942666 is 6662491653581.

It is a junction number, because it is equal to n+sod(n) for n = 1853561942599 and 1853561942608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6690956 + ... + 6962471.

It is an arithmetic number, because the mean of its divisors is an integer number (198616417116).

Almost surely, 2^{1853561942666} is an apocalyptic number.

1853561942666 is a deficient number, since it is larger than the sum of its proper divisors (1324300731190).

1853561942666 is a wasteful number, since it uses less digits than its factorization.

1853561942666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13663133.

The product of its digits is 55987200, while the sum is 62.

The spelling of 1853561942666 in words is "one trillion, eight hundred fifty-three billion, five hundred sixty-one million, nine hundred forty-two thousand, six hundred sixty-six".