1166203851804 has 48 divisors (see below), whose sum is σ = 3025812240640. Its totient is φ = 388436232240.

The previous prime is 1166203851793. The next prime is 1166203851823. The reversal of 1166203851804 is 4081583026611.

1166203851804 is a `hidden beast` number, since 1 + 1 + 6 + 620 + 3 + 8 + 5 + 18 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1166203851804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4002862 + ... + 4284309.

Almost surely, 2^{1166203851804} is an apocalyptic number.

It is an amenable number.

1166203851804 is an abundant number, since it is smaller than the sum of its proper divisors (1859608388836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1166203851804 is a wasteful number, since it uses less digits than its factorization.

1166203851804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8288487 (or 8288479 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 1166203851804 in words is "one trillion, one hundred sixty-six billion, two hundred three million, eight hundred fifty-one thousand, eight hundred four".