1816661786008 has 16 divisors (see below), whose sum is σ = 3406287881880. Its totient is φ = 908318350848.

The previous prime is 1816661785997. The next prime is 1816661786053. The reversal of 1816661786008 is 8006871666181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937266 + ... + 2124097.

Almost surely, 2^{1816661786008} is an apocalyptic number.

It is an amenable number.

1816661786008 is a deficient number, since it is larger than the sum of its proper divisors (1589626095872).

1816661786008 is a wasteful number, since it uses less digits than its factorization.

1816661786008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135546 (or 3135542 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 1816661786008 in words is "one trillion, eight hundred sixteen billion, six hundred sixty-one million, seven hundred eighty-six thousand, eight".