2001646105 has 32 divisors (see below), whose sum is σ = 2621122560. Its totient is φ = 1462380480.

The previous prime is 2001646081. The next prime is 2001646109. The reversal of 2001646105 is 5016461002.

It is not a de Polignac number, because 2001646105 - 2¹⁹ = 2001121817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001646105.

It is not an unprimeable number, because it can be changed into a prime (2001646109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295810 + ... + 302500.

It is an arithmetic number, because the mean of its divisors is an integer number (81910080).

Almost surely, 2^2001646105 is an apocalyptic number.

It is an amenable number.

2001646105 is a deficient number, since it is larger than the sum of its proper divisors (619476455).

2001646105 is a wasteful number, since it uses less digits than its factorization.

2001646105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6829.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2001646105 is about 44739.7597780766. The cubic root of 2001646105 is about 1260.2666154960.

The spelling of 2001646105 in words is "two billion, one million, six hundred forty-six thousand, one hundred five".