2780836728367 has 4 divisors (see below), whose sum is σ = 2806348992040. Its totient is φ = 2755324464696.

The previous prime is 2780836728361. The next prime is 2780836728389. The reversal of 2780836728367 is 7638276380872.

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

It is a cyclic number.

It is not a de Polignac number, because 2780836728367 - 2⁷ = 2780836728239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780836728361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12756131673 + ... + 12756131890.

It is an arithmetic number, because the mean of its divisors is an integer number (701587248010).

Almost surely, 2^{2780836728367} is an apocalyptic number.

2780836728367 is a deficient number, since it is larger than the sum of its proper divisors (25512263673).

2780836728367 is a wasteful number, since it uses less digits than its factorization.

2780836728367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25512263672.

The product of its (nonzero) digits is 227598336, while the sum is 67.

The spelling of 2780836728367 in words is "two trillion, seven hundred eighty billion, eight hundred thirty-six million, seven hundred twenty-eight thousand, three hundred sixty-seven".