1780568213146 has 8 divisors (see below), whose sum is σ = 2695355552340. Its totient is φ = 882116362368.

The previous prime is 1780568213143. The next prime is 1780568213189. The reversal of 1780568213146 is 6413128650871.

It can be written as a sum of positive squares in 2 ways, for example, as 1477831666921 + 302736546225 = 1215661^2 + 550215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1780568213093 and 1780568213102.

It is not an unprimeable number, because it can be changed into a prime (1780568213143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4083871831 + ... + 4083872266.

Almost surely, 2^{1780568213146} is an apocalyptic number.

1780568213146 is a deficient number, since it is larger than the sum of its proper divisors (914787339194).

1780568213146 is a wasteful number, since it uses less digits than its factorization.

1780568213146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167744208.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 1780568213146 in words is "one trillion, seven hundred eighty billion, five hundred sixty-eight million, two hundred thirteen thousand, one hundred forty-six".