6446643042 has 16 divisors (see below), whose sum is σ = 14735184192. Its totient is φ = 1841898000.

The previous prime is 6446643029. The next prime is 6446643059. The reversal of 6446643042 is 2403466446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76745709 + ... + 76745792.

It is an arithmetic number, because the mean of its divisors is an integer number (920949012).

Almost surely, 2^6446643042 is an apocalyptic number.

6446643042 is an abundant number, since it is smaller than the sum of its proper divisors (8288541150).

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

6446643042 is a wasteful number, since it uses less digits than its factorization.

6446643042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153491513.

The product of its (nonzero) digits is 331776, while the sum is 39.

The square root of 6446643042 is about 80290.9897933759. The cubic root of 6446643042 is about 1861.1349917473.

The spelling of 6446643042 in words is "six billion, four hundred forty-six million, six hundred forty-three thousand, forty-two".