6783450061789 has 4 divisors (see below), whose sum is σ = 6802666634556. Its totient is φ = 6764233489024.

The previous prime is 6783450061783. The next prime is 6783450061819. The reversal of 6783450061789 is 9871600543876.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5358840716889 + 1424609344900 = 2314917^2 + 1193570^2 .

It is a cyclic number.

It is not a de Polignac number, because 6783450061789 - 2¹⁵ = 6783450029021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6783450061789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6783450061783) 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 in 3 ways as a sum of consecutive naturals, for example, 9608285854 + ... + 9608286559.

It is an arithmetic number, because the mean of its divisors is an integer number (1700666658639).

Almost surely, 2^{6783450061789} is an apocalyptic number.

It is an amenable number.

6783450061789 is a deficient number, since it is larger than the sum of its proper divisors (19216572767).

6783450061789 is a wasteful number, since it uses less digits than its factorization.

6783450061789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19216572766.

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 6783450061789 in words is "six trillion, seven hundred eighty-three billion, four hundred fifty million, sixty-one thousand, seven hundred eighty-nine".