1980545283677 has 2 divisors, whose sum is σ = 1980545283678. Its totient is φ = 1980545283676.

The previous prime is 1980545283671. The next prime is 1980545283763. The reversal of 1980545283677 is 7763825450891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1516823780836 + 463721502841 = 1231594^2 + 680971^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980545283677 - 2⁸ = 1980545283421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980545283671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990272641838 + 990272641839.

It is an arithmetic number, because the mean of its divisors is an integer number (990272641839).

It is a 1-persistent number, because it is pandigital, but 2⋅1980545283677 = 3961090567354 is not.

Almost surely, 2^{1980545283677} is an apocalyptic number.

It is an amenable number.

1980545283677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980545283677 is an equidigital number, since it uses as much as digits as its factorization.

1980545283677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 101606400, while the sum is 65.

The spelling of 1980545283677 in words is "one trillion, nine hundred eighty billion, five hundred forty-five million, two hundred eighty-three thousand, six hundred seventy-seven".