6442977144 has 48 divisors (see below), whose sum is σ = 16509992760. Its totient is φ = 2095264000.

The previous prime is 6442977091. The next prime is 6442977199. The reversal of 6442977144 is 4417792446.

It is a junction number, because it is equal to n+sod(n) for n = 6442977093 and 6442977102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39507 + ... + 120194.

Almost surely, 2^6442977144 is an apocalyptic number.

It is an amenable number.

6442977144 is an abundant number, since it is smaller than the sum of its proper divisors (10067015616).

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

6442977144 is a wasteful number, since it uses less digits than its factorization.

6442977144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159792 (or 159747 counting only the distinct ones).

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

The square root of 6442977144 is about 80268.1577214776. The cubic root of 6442977144 is about 1860.7821453298.

The spelling of 6442977144 in words is "six billion, four hundred forty-two million, nine hundred seventy-seven thousand, one hundred forty-four".