1806921417120 has 48 divisors (see below), whose sum is σ = 5691802465440. Its totient is φ = 481845711104.

The previous prime is 1806921417113. The next prime is 1806921417139. The reversal of 1806921417120 is 217141296081.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1882209330 + ... + 1882210289.

It is an arithmetic number, because the mean of its divisors is an integer number (118579218030).

Almost surely, 2^{1806921417120} is an apocalyptic number.

1806921417120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1806921417120 is an abundant number, since it is smaller than the sum of its proper divisors (3884881048320).

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

1806921417120 is a wasteful number, since it uses less digits than its factorization.

1806921417120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3764419637 (or 3764419629 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The spelling of 1806921417120 in words is "one trillion, eight hundred six billion, nine hundred twenty-one million, four hundred seventeen thousand, one hundred twenty".