2143644042 has 16 divisors (see below), whose sum is σ = 4368180960. Its totient is φ = 701065872.

The previous prime is 2143644001. The next prime is 2143644043. The reversal of 2143644042 is 2404463412.

It is not an unprimeable number, because it can be changed into a prime (2143644043) 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, 3370192 + ... + 3370827.

It is an arithmetic number, because the mean of its divisors is an integer number (273011310).

Almost surely, 2^2143644042 is an apocalyptic number.

2143644042 is an abundant number, since it is smaller than the sum of its proper divisors (2224536918).

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

2143644042 is a wasteful number, since it uses less digits than its factorization.

2143644042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741077.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 2143644042 is about 46299.5036906445. The cubic root of 2143644042 is about 1289.3897804947.

The spelling of 2143644042 in words is "two billion, one hundred forty-three million, six hundred forty-four thousand, forty-two".