1643265112 has 16 divisors (see below), whose sum is σ = 3180513600. Its totient is φ = 795128160.

The previous prime is 1643265083. The next prime is 1643265131. The reversal of 1643265112 is 2115623461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3312787 + ... + 3313282.

It is an arithmetic number, because the mean of its divisors is an integer number (198782100).

Almost surely, 2^1643265112 is an apocalyptic number.

It is an amenable number.

1643265112 is a deficient number, since it is larger than the sum of its proper divisors (1537248488).

1643265112 is a wasteful number, since it uses less digits than its factorization.

1643265112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6626106 (or 6626102 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 1643265112 is about 40537.2065145096. The cubic root of 1643265112 is about 1180.0558031639.

Adding to 1643265112 its reverse (2115623461), we get a palindrome (3758888573).

The spelling of 1643265112 in words is "one billion, six hundred forty-three million, two hundred sixty-five thousand, one hundred twelve".