201686701689 has 12 divisors (see below), whose sum is σ = 317809348272. Its totient is φ = 122234364600.

The previous prime is 201686701687. The next prime is 201686701691. The reversal of 201686701689 is 986107686102.

It is an interprime number because it is at equal distance from previous prime (201686701687) and next prime (201686701691).

It is not a de Polignac number, because 201686701689 - 2¹ = 201686701687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201686701687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1018619607 + ... + 1018619804.

It is an arithmetic number, because the mean of its divisors is an integer number (26484112356).

Almost surely, 2^201686701689 is an apocalyptic number.

It is an amenable number.

201686701689 is a deficient number, since it is larger than the sum of its proper divisors (116122646583).

201686701689 is a wasteful number, since it uses less digits than its factorization.

201686701689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037239428 (or 2037239425 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 201686701689 in words is "two hundred one billion, six hundred eighty-six million, seven hundred one thousand, six hundred eighty-nine".