6554818616644 has 9 divisors (see below), whose sum is σ = 11470941539967. Its totient is φ = 3277406748084.

The previous prime is 6554818616573. The next prime is 6554818616711. The reversal of 6554818616644 is 4466168184556.

The square root of 6554818616644 is 2560238.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4480417 + ... + 5760535.

Almost surely, 2^{6554818616644} is an apocalyptic number.

6554818616644 is the 2560238-th square number.

It is an amenable number.

6554818616644 is a deficient number, since it is larger than the sum of its proper divisors (4916122923323).

6554818616644 is an frugal number, since it uses more digits than its factorization.

6554818616644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560242 (or 1280121 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 64.

Multiplying 6554818616644 by its sum of digits (64), we get a square (419508391465216 = 20481904²).

The spelling of 6554818616644 in words is "six trillion, five hundred fifty-four billion, eight hundred eighteen million, six hundred sixteen thousand, six hundred forty-four".