1806473664 has 196 divisors, whose sum is σ = 5552440000. Its totient is φ = 582266880.

The previous prime is 1806473639. The next prime is 1806473687. The reversal of 1806473664 is 4663746081.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1445712 + ... + 1446960.

Almost surely, 2^1806473664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806473664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2776220000).

1806473664 is an abundant number, since it is smaller than the sum of its proper divisors (3745966336).

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

1806473664 is an equidigital number, since it uses as much as digits as its factorization.

1806473664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 1806473664 is about 42502.6312597232. The cubic root of 1806473664 is about 1217.8969555379.

The spelling of 1806473664 in words is "one billion, eight hundred six million, four hundred seventy-three thousand, six hundred sixty-four".