1685020038371 has 2 divisors, whose sum is σ = 1685020038372. Its totient is φ = 1685020038370.

The previous prime is 1685020038347. The next prime is 1685020038409. The reversal of 1685020038371 is 1738300205861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1685020038371 - 2⁶ = 1685020038307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1685020038271) by changing a digit.

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 as a sum of consecutive naturals, namely, 842510019185 + 842510019186.

It is an arithmetic number, because the mean of its divisors is an integer number (842510019186).

Almost surely, 2^{1685020038371} is an apocalyptic number.

1685020038371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685020038371 is an equidigital number, since it uses as much as digits as its factorization.

1685020038371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 1685020038371 in words is "one trillion, six hundred eighty-five billion, twenty million, thirty-eight thousand, three hundred seventy-one".