1980545283687 has 16 divisors (see below), whose sum is σ = 2645773067520. Its totient is φ = 1317841224000.

The previous prime is 1980545283677. The next prime is 1980545283763. The reversal of 1980545283687 is 7863825450891.

It is not a de Polignac number, because 1980545283687 - 2⁴ = 1980545283671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980545283677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11506812 + ... + 11677662.

It is an arithmetic number, because the mean of its divisors is an integer number (165360816720).

It is a 1-persistent number, because it is pandigital, but 2⋅1980545283687 = 3961090567374 is not.

Almost surely, 2^{1980545283687} is an apocalyptic number.

1980545283687 is a deficient number, since it is larger than the sum of its proper divisors (665227783833).

1980545283687 is a wasteful number, since it uses less digits than its factorization.

1980545283687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178214.

The product of its (nonzero) digits is 116121600, while the sum is 66.

The spelling of 1980545283687 in words is "one trillion, nine hundred eighty billion, five hundred forty-five million, two hundred eighty-three thousand, six hundred eighty-seven".