6445645142 has 8 divisors (see below), whose sum is σ = 9874179936. Its totient is φ = 3154251832.

The previous prime is 6445645133. The next prime is 6445645163. The reversal of 6445645142 is 2415465446.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6445645142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34285253 + ... + 34285440.

It is an arithmetic number, because the mean of its divisors is an integer number (1234272492).

Almost surely, 2^6445645142 is an apocalyptic number.

6445645142 is a deficient number, since it is larger than the sum of its proper divisors (3428534794).

6445645142 is a wasteful number, since it uses less digits than its factorization.

6445645142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68570742.

The product of its digits is 460800, while the sum is 41.

The square root of 6445645142 is about 80284.7752814941. The cubic root of 6445645142 is about 1861.0389561086.

The spelling of 6445645142 in words is "six billion, four hundred forty-five million, six hundred forty-five thousand, one hundred forty-two".