6646272868144 has 80 divisors (see below), whose sum is σ = 15896687269120. Its totient is φ = 2621351082240.

The previous prime is 6646272868049. The next prime is 6646272868171. The reversal of 6646272868144 is 4418682726466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6413454 + ... + 7377325.

It is an arithmetic number, because the mean of its divisors is an integer number (198708590864).

Almost surely, 2^{6646272868144} is an apocalyptic number.

It is an amenable number.

6646272868144 is an abundant number, since it is smaller than the sum of its proper divisors (9250414400976).

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

6646272868144 is a wasteful number, since it uses less digits than its factorization.

6646272868144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13791138 (or 13791132 counting only the distinct ones).

The product of its digits is 148635648, while the sum is 64.

The spelling of 6646272868144 in words is "six trillion, six hundred forty-six billion, two hundred seventy-two million, eight hundred sixty-eight thousand, one hundred forty-four".