1643351122215 has 48 divisors (see below), whose sum is σ = 3191412141216. Its totient is φ = 775241798400.

The previous prime is 1643351122199. The next prime is 1643351122223. The reversal of 1643351122215 is 5122211533461.

1643351122215 is a `hidden beast` number, since 1 + 6 + 433 + 5 + 1 + 1 + 2 + 2 + 215 = 666.

It is not a de Polignac number, because 1643351122215 - 2⁴ = 1643351122199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1643351122215.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44845216 + ... + 44881845.

It is an arithmetic number, because the mean of its divisors is an integer number (66487752942).

Almost surely, 2^{1643351122215} is an apocalyptic number.

1643351122215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1643351122215 is a deficient number, since it is larger than the sum of its proper divisors (1548061019001).

1643351122215 is a wasteful number, since it uses less digits than its factorization.

1643351122215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89727120 (or 89727117 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 1643351122215 its reverse (5122211533461), we get a palindrome (6765562655676).

The spelling of 1643351122215 in words is "one trillion, six hundred forty-three billion, three hundred fifty-one million, one hundred twenty-two thousand, two hundred fifteen".