2781464781647 has 8 divisors (see below), whose sum is σ = 2952075804912. Its totient is φ = 2611631030400.

The previous prime is 2781464781631. The next prime is 2781464781649. The reversal of 2781464781647 is 7461874641872.

2781464781647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2781464781647 - 2⁴ = 2781464781631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781464781649) 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, 194310629 + ... + 194324942.

It is an arithmetic number, because the mean of its divisors is an integer number (369009475614).

Almost surely, 2^{2781464781647} is an apocalyptic number.

2781464781647 is a deficient number, since it is larger than the sum of its proper divisors (170611023265).

2781464781647 is a wasteful number, since it uses less digits than its factorization.

2781464781647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388636009.

The product of its digits is 101154816, while the sum is 65.

The spelling of 2781464781647 in words is "two trillion, seven hundred eighty-one billion, four hundred sixty-four million, seven hundred eighty-one thousand, six hundred forty-seven".