2144663646 has 32 divisors (see below), whose sum is σ = 4543877760. Its totient is φ = 672942816.

The previous prime is 2144663641. The next prime is 2144663659. The reversal of 2144663646 is 6463664412.

It is a junction number, because it is equal to n+sod(n) for n = 2144663598 and 2144663607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144663641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42016 + ... + 77811.

It is an arithmetic number, because the mean of its divisors is an integer number (141996180).

Almost surely, 2^2144663646 is an apocalyptic number.

2144663646 is an abundant number, since it is smaller than the sum of its proper divisors (2399214114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2144663646 is a wasteful number, since it uses less digits than its factorization.

2144663646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120008.

The product of its digits is 497664, while the sum is 42.

The square root of 2144663646 is about 46310.5133420048. The cubic root of 2144663646 is about 1289.5941767736.

The spelling of 2144663646 in words is "two billion, one hundred forty-four million, six hundred sixty-three thousand, six hundred forty-six".