201686701690 has 64 divisors (see below), whose sum is σ = 384939475200. Its totient is φ = 75925707264.

The previous prime is 201686701687. The next prime is 201686701691. The reversal of 201686701690 is 96107686102.

It is a super-3 number, since 3×201686701690³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 201686701690.

It is not an unprimeable number, because it can be changed into a prime (201686701691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7020676 + ... + 7049344.

It is an arithmetic number, because the mean of its divisors is an integer number (6014679300).

Almost surely, 2^201686701690 is an apocalyptic number.

201686701690 is a deficient number, since it is larger than the sum of its proper divisors (183252773510).

201686701690 is a wasteful number, since it uses less digits than its factorization.

201686701690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29191.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 201686701690 in words is "two hundred one billion, six hundred eighty-six million, seven hundred one thousand, six hundred ninety".