1984555061648 has 20 divisors (see below), whose sum is σ = 3897747700428. Its totient is φ = 978684687360.

The previous prime is 1984555061633. The next prime is 1984555061651. The reversal of 1984555061648 is 8461605554891.

It can be written as a sum of positive squares in 2 ways, for example, as 1067312139664 + 917242921984 = 1033108^2 + 957728^2 .

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, 849551513 + ... + 849553848.

Almost surely, 2^{1984555061648} is an apocalyptic number.

It is an amenable number.

1984555061648 is a deficient number, since it is larger than the sum of its proper divisors (1913192638780).

1984555061648 is a wasteful number, since it uses less digits than its factorization.

1984555061648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699105442 (or 1699105436 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 62.

The spelling of 1984555061648 in words is "one trillion, nine hundred eighty-four billion, five hundred fifty-five million, sixty-one thousand, six hundred forty-eight".