2782664565 has 16 divisors (see below), whose sum is σ = 4536269568. Its totient is φ = 1456085696.

The previous prime is 2782664539. The next prime is 2782664581. The reversal of 2782664565 is 5654662872.

It is a cyclic number.

It is not a de Polignac number, because 2782664565 - 2¹⁴ = 2782648181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1749309 + ... + 1750898.

It is an arithmetic number, because the mean of its divisors is an integer number (283516848).

Almost surely, 2^2782664565 is an apocalyptic number.

It is an amenable number.

2782664565 is a deficient number, since it is larger than the sum of its proper divisors (1753605003).

2782664565 is a wasteful number, since it uses less digits than its factorization.

2782664565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500268.

The product of its digits is 4838400, while the sum is 51.

The square root of 2782664565 is about 52750.9674318870. The cubic root of 2782664565 is about 1406.5449611004.

The spelling of 2782664565 in words is "two billion, seven hundred eighty-two million, six hundred sixty-four thousand, five hundred sixty-five".