1801851606 has 48 divisors (see below), whose sum is σ = 4043239200. Its totient is φ = 579245184.

The previous prime is 1801851599. The next prime is 1801851613. The reversal of 1801851606 is 6061581081.

It is an interprime number because it is at equal distance from previous prime (1801851599) and next prime (1801851613).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 687210 + ... + 689826.

It is an arithmetic number, because the mean of its divisors is an integer number (84234150).

Almost surely, 2^1801851606 is an apocalyptic number.

1801851606 is an abundant number, since it is smaller than the sum of its proper divisors (2241387594).

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

1801851606 is a wasteful number, since it uses less digits than its factorization.

1801851606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973 (or 3970 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 1801851606 is about 42448.2226483041. Note that the first 3 decimals coincide. The cubic root of 1801851606 is about 1216.8573614236.

The spelling of 1801851606 in words is "one billion, eight hundred one million, eight hundred fifty-one thousand, six hundred six".