1801966445 has 8 divisors (see below), whose sum is σ = 2164942080. Its totient is φ = 1439851600.

The previous prime is 1801966433. The next prime is 1801966477. The reversal of 1801966445 is 5446691081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1801966445 - 2¹⁰ = 1801965421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1801966396 and 1801966405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210581 + ... + 218970.

It is an arithmetic number, because the mean of its divisors is an integer number (270617760).

Almost surely, 2^1801966445 is an apocalyptic number.

It is an amenable number.

1801966445 is a deficient number, since it is larger than the sum of its proper divisors (362975635).

1801966445 is an equidigital number, since it uses as much as digits as its factorization.

1801966445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430395.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1801966445 is about 42449.5753217862. The cubic root of 1801966445 is about 1216.8832125561.

The spelling of 1801966445 in words is "one billion, eight hundred one million, nine hundred sixty-six thousand, four hundred forty-five".