1780005482477 has 2 divisors, whose sum is σ = 1780005482478. Its totient is φ = 1780005482476.

The previous prime is 1780005482447. The next prime is 1780005482543. The reversal of 1780005482477 is 7742845000871.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1187361094921 + 592644387556 = 1089661^2 + 769834^2 .

It is an emirp because it is prime and its reverse (7742845000871) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1780005482477 - 2⁶ = 1780005482413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1780005482447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890002741238 + 890002741239.

It is an arithmetic number, because the mean of its divisors is an integer number (890002741239).

Almost surely, 2^{1780005482477} is an apocalyptic number.

It is an amenable number.

1780005482477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1780005482477 is an equidigital number, since it uses as much as digits as its factorization.

1780005482477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3512320, while the sum is 53.

The spelling of 1780005482477 in words is "one trillion, seven hundred eighty billion, five million, four hundred eighty-two thousand, four hundred seventy-seven".