1685016851803 has 2 divisors, whose sum is σ = 1685016851804. Its totient is φ = 1685016851802.

The previous prime is 1685016851767. The next prime is 1685016851821. The reversal of 1685016851803 is 3081586105861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1685016851803 - 2¹⁷ = 1685016720731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1685016851863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842508425901 + 842508425902.

It is an arithmetic number, because the mean of its divisors is an integer number (842508425902).

Almost surely, 2^{1685016851803} is an apocalyptic number.

1685016851803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685016851803 is an equidigital number, since it uses as much as digits as its factorization.

1685016851803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382400, while the sum is 52.

The spelling of 1685016851803 in words is "one trillion, six hundred eighty-five billion, sixteen million, eight hundred fifty-one thousand, eight hundred three".