1980555547424 has 24 divisors (see below), whose sum is σ = 3994321632588. Its totient is φ = 966124656640.

The previous prime is 1980555547391. The next prime is 1980555547489. The reversal of 1980555547424 is 4247455550891.

It can be written as a sum of positive squares in 2 ways, for example, as 1747525363600 + 233030183824 = 1321940^2 + 482732^2 .

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, 754783577 + ... + 754786200.

Almost surely, 2^{1980555547424} is an apocalyptic number.

It is an amenable number.

1980555547424 is an abundant number, since it is smaller than the sum of its proper divisors (2013766085164).

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

1980555547424 is a wasteful number, since it uses less digits than its factorization.

1980555547424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509569828 (or 1509569820 counting only the distinct ones).

The product of its (nonzero) digits is 40320000, while the sum is 59.

The spelling of 1980555547424 in words is "one trillion, nine hundred eighty billion, five hundred fifty-five million, five hundred forty-seven thousand, four hundred twenty-four".