1685001851851 has 8 divisors (see below), whose sum is σ = 1685832588000. Its totient is φ = 1684171298880.

The previous prime is 1685001851849. The next prime is 1685001851917. The reversal of 1685001851851 is 1581581005861.

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 1685001851851 - 2¹ = 1685001851849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1685001851795 and 1685001851804.

It is not an unprimeable number, because it can be changed into a prime (1685001851801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20590746 + ... + 20672416.

It is an arithmetic number, because the mean of its divisors is an integer number (210729073500).

Almost surely, 2^{1685001851851} is an apocalyptic number.

1685001851851 is a deficient number, since it is larger than the sum of its proper divisors (830736149).

1685001851851 is an equidigital number, since it uses as much as digits as its factorization.

1685001851851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91589.

The product of its (nonzero) digits is 384000, while the sum is 49.

The spelling of 1685001851851 in words is "one trillion, six hundred eighty-five billion, one million, eight hundred fifty-one thousand, eight hundred fifty-one".