201640569 has 8 divisors (see below), whose sum is σ = 289535232. Its totient is φ = 124086480.

The previous prime is 201640561. The next prime is 201640589. The reversal of 201640569 is 965046102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201640569 - 2³ = 201640561 is a prime.

It is a super-2 number, since 2×201640569² = 81317838133287522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201640561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585097 + ... + 2585174.

It is an arithmetic number, because the mean of its divisors is an integer number (36191904).

Almost surely, 2^201640569 is an apocalyptic number.

It is an amenable number.

201640569 is a deficient number, since it is larger than the sum of its proper divisors (87894663).

201640569 is a wasteful number, since it uses less digits than its factorization.

201640569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170287.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 201640569 is about 14200.0200351971. The cubic root of 201640569 is about 586.3982129132.

The spelling of 201640569 in words is "two hundred one million, six hundred forty thousand, five hundred sixty-nine".