1980208758629 has 2 divisors, whose sum is σ = 1980208758630. Its totient is φ = 1980208758628.

The previous prime is 1980208758509. The next prime is 1980208758631. The reversal of 1980208758629 is 9268578020891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1679361993604 + 300846765025 = 1295902^2 + 548495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980208758629 - 2⁴⁰ = 880697130853 is a prime.

Together with 1980208758631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980208758679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990104379314 + 990104379315.

It is an arithmetic number, because the mean of its divisors is an integer number (990104379315).

Almost surely, 2^{1980208758629} is an apocalyptic number.

It is an amenable number.

1980208758629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980208758629 is an equidigital number, since it uses as much as digits as its factorization.

1980208758629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 65.

The spelling of 1980208758629 in words is "one trillion, nine hundred eighty billion, two hundred eight million, seven hundred fifty-eight thousand, six hundred twenty-nine".