201686668464 has 40 divisors (see below), whose sum is σ = 532109514240. Its totient is φ = 65798486848.

The previous prime is 201686668439. The next prime is 201686668481. The reversal of 201686668464 is 464866686102.

It is a super-2 number, since 2×201686668464² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44697804 + ... + 44702315.

It is an arithmetic number, because the mean of its divisors is an integer number (13302737856).

Almost surely, 2^201686668464 is an apocalyptic number.

201686668464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

201686668464 is an abundant number, since it is smaller than the sum of its proper divisors (330422845776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201686668464 is a wasteful number, since it uses less digits than its factorization.

201686668464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89400177 (or 89400171 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 57.

The spelling of 201686668464 in words is "two hundred one billion, six hundred eighty-six million, six hundred sixty-eight thousand, four hundred sixty-four".