201643630515 has 12 divisors (see below), whose sum is σ = 349515626304. Its totient is φ = 107543269584.

The previous prime is 201643630417. The next prime is 201643630519. The reversal of 201643630515 is 515036346102.

201643630515 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 4 + 3 + 630 + 5 + 15 = 666.

It is not a de Polignac number, because 201643630515 - 2⁸ = 201643630259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201643630515.

It is not an unprimeable number, because it can be changed into a prime (201643630519) 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, 2240484739 + ... + 2240484828.

It is an arithmetic number, because the mean of its divisors is an integer number (29126302192).

Almost surely, 2^201643630515 is an apocalyptic number.

201643630515 is a deficient number, since it is larger than the sum of its proper divisors (147871995789).

201643630515 is a wasteful number, since it uses less digits than its factorization.

201643630515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480969578 (or 4480969575 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 201643630515 its reverse (515036346102), we get a palindrome (716679976617).

The spelling of 201643630515 in words is "two hundred one billion, six hundred forty-three million, six hundred thirty thousand, five hundred fifteen".