1980544865280 has 88 divisors (see below), whose sum is σ = 6334649016672. Its totient is φ = 528145293312.

The previous prime is 1980544865269. The next prime is 1980544865281. The reversal of 1980544865280 is 825684450891.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980544865281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64455502 + ... + 64486221.

Almost surely, 2^{1980544865280} is an apocalyptic number.

1980544865280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1980544865280 is an abundant number, since it is smaller than the sum of its proper divisors (4354104151392).

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

1980544865280 is a wasteful number, since it uses less digits than its factorization.

1980544865280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128941751 (or 128941733 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 60.

The spelling of 1980544865280 in words is "one trillion, nine hundred eighty billion, five hundred forty-four million, eight hundred sixty-five thousand, two hundred eighty".