1980485205169 has 2 divisors, whose sum is σ = 1980485205170. Its totient is φ = 1980485205168.

The previous prime is 1980485205109. The next prime is 1980485205233. The reversal of 1980485205169 is 9615025840891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1438531574544 + 541953630625 = 1199388^2 + 736175^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980485205169 - 2³³ = 1971895270577 is a prime.

It is a super-2 number, since 2×1980485205169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1980485205109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990242602584 + 990242602585.

It is an arithmetic number, because the mean of its divisors is an integer number (990242602585).

Almost surely, 2^{1980485205169} is an apocalyptic number.

It is an amenable number.

1980485205169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980485205169 is an equidigital number, since it uses as much as digits as its factorization.

1980485205169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 58.

The spelling of 1980485205169 in words is "one trillion, nine hundred eighty billion, four hundred eighty-five million, two hundred five thousand, one hundred sixty-nine".