6442144977 has 8 divisors (see below), whose sum is σ = 8657161216. Its totient is φ = 4260946032.

The previous prime is 6442144931. The next prime is 6442144979. The reversal of 6442144977 is 7794412446.

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

It is not a de Polignac number, because 6442144977 - 2²⁰ = 6441096401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442144979) 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, 8453878 + ... + 8454639.

It is an arithmetic number, because the mean of its divisors is an integer number (1082145152).

Almost surely, 2^6442144977 is an apocalyptic number.

It is an amenable number.

6442144977 is a deficient number, since it is larger than the sum of its proper divisors (2215016239).

6442144977 is a wasteful number, since it uses less digits than its factorization.

6442144977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16908647.

The product of its digits is 1354752, while the sum is 48.

The square root of 6442144977 is about 80262.9738858460. The cubic root of 6442144977 is about 1860.7020297698.

The spelling of 6442144977 in words is "six billion, four hundred forty-two million, one hundred forty-four thousand, nine hundred seventy-seven".