1801666653156 has 36 divisors (see below), whose sum is σ = 4660124861392. Its totient is φ = 586589142384.

The previous prime is 1801666653139. The next prime is 1801666653217. The reversal of 1801666653156 is 6513566661081.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 581932126 + ... + 581935221.

Almost surely, 2^{1801666653156} is an apocalyptic number.

It is an amenable number.

1801666653156 is an abundant number, since it is smaller than the sum of its proper divisors (2858458208236).

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

1801666653156 is a wasteful number, since it uses less digits than its factorization.

1801666653156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163867400 (or 1163867395 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 1801666653156 in words is "one trillion, eight hundred one billion, six hundred sixty-six million, six hundred fifty-three thousand, one hundred fifty-six".