2765564863 has 2 divisors, whose sum is σ = 2765564864. Its totient is φ = 2765564862.

The previous prime is 2765564861. The next prime is 2765564917. The reversal of 2765564863 is 3684655672.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2765564863 - 2¹ = 2765564861 is a prime.

It is a super-2 number, since 2×2765564863² = 15296698022920417538, which contains 22 as substring.

Together with 2765564861, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2765564863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2765564861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382782431 + 1382782432.

It is an arithmetic number, because the mean of its divisors is an integer number (1382782432).

Almost surely, 2^2765564863 is an apocalyptic number.

2765564863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2765564863 is an equidigital number, since it uses as much as digits as its factorization.

2765564863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 52.

The square root of 2765564863 is about 52588.6381550236. The cubic root of 2765564863 is about 1403.6579279288.

The spelling of 2765564863 in words is "two billion, seven hundred sixty-five million, five hundred sixty-four thousand, eight hundred sixty-three".