12001801643 has 8 divisors (see below), whose sum is σ = 12926298000. Its totient is φ = 11077488288.

The previous prime is 12001801633. The next prime is 12001801657. The reversal of 12001801643 is 34610810021.

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

It is a cyclic number.

It is not a de Polignac number, because 12001801643 - 2⁸ = 12001801387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001801613) 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, 110168 + ... + 190106.

It is an arithmetic number, because the mean of its divisors is an integer number (1615787250).

Almost surely, 2^12001801643 is an apocalyptic number.

12001801643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12001801643 is a deficient number, since it is larger than the sum of its proper divisors (924496357).

12001801643 is a wasteful number, since it uses less digits than its factorization.

12001801643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91501.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 12001801643 in words is "twelve billion, one million, eight hundred one thousand, six hundred forty-three".