2781096865 has 16 divisors (see below), whose sum is σ = 3541449600. Its totient is φ = 2092068352.

The previous prime is 2781096863. The next prime is 2781096883. The reversal of 2781096865 is 5686901872.

It is a cyclic number.

It is not a de Polignac number, because 2781096865 - 2¹ = 2781096863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2781096863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198160 + ... + 211729.

It is an arithmetic number, because the mean of its divisors is an integer number (221340600).

Almost surely, 2^2781096865 is an apocalyptic number.

It is an amenable number.

2781096865 is a deficient number, since it is larger than the sum of its proper divisors (760352735).

2781096865 is a wasteful number, since it uses less digits than its factorization.

2781096865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409976.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 2781096865 is about 52736.1058952972. The cubic root of 2781096865 is about 1406.2807713036.

The spelling of 2781096865 in words is "two billion, seven hundred eighty-one million, ninety-six thousand, eight hundred sixty-five".