6780534139784 has 32 divisors (see below), whose sum is σ = 12863111270040. Its totient is φ = 3350495232000.

The previous prime is 6780534139693. The next prime is 6780534139789. The reversal of 6780534139784 is 4879314350876.

It can be written as a sum of positive squares in 4 ways, for example, as 6590115362884 + 190418776900 = 2567122^2 + 436370^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6780534139784.

It is not an unprimeable number, because it can be changed into a prime (6780534139789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7318649 + ... + 8192904.

Almost surely, 2^{6780534139784} is an apocalyptic number.

It is an amenable number.

6780534139784 is a deficient number, since it is larger than the sum of its proper divisors (6082577130256).

6780534139784 is a wasteful number, since it uses less digits than its factorization.

6780534139784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15512201 (or 15512197 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 65.

The spelling of 6780534139784 in words is "six trillion, seven hundred eighty billion, five hundred thirty-four million, one hundred thirty-nine thousand, seven hundred eighty-four".