1801372985 has 8 divisors (see below), whose sum is σ = 2211918720. Its totient is φ = 1407584304.

The previous prime is 1801372981. The next prime is 1801372999. The reversal of 1801372985 is 5892731081.

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

It is a cyclic number.

It is not a de Polignac number, because 1801372985 - 2² = 1801372981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1801372981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4189025 + ... + 4189454.

It is an arithmetic number, because the mean of its divisors is an integer number (276489840).

Almost surely, 2^1801372985 is an apocalyptic number.

It is an amenable number.

1801372985 is a deficient number, since it is larger than the sum of its proper divisors (410545735).

1801372985 is an equidigital number, since it uses as much as digits as its factorization.

1801372985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8378527.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 1801372985 is about 42442.5845702167. The cubic root of 1801372985 is about 1216.7496083654.

The spelling of 1801372985 in words is "one billion, eight hundred one million, three hundred seventy-two thousand, nine hundred eighty-five".