2765516261 has 2 divisors, whose sum is σ = 2765516262. Its totient is φ = 2765516260.

The previous prime is 2765516219. The next prime is 2765516267. The reversal of 2765516261 is 1626155672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2715035236 + 50481025 = 52106^2 + 7105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2765516261 - 2¹⁰ = 2765515237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2765516267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382758130 + 1382758131.

It is an arithmetic number, because the mean of its divisors is an integer number (1382758131).

Almost surely, 2^2765516261 is an apocalyptic number.

It is an amenable number.

2765516261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2765516261 is an equidigital number, since it uses as much as digits as its factorization.

2765516261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 2765516261 is about 52588.1760569807. The cubic root of 2765516261 is about 1403.6497052587.

The spelling of 2765516261 in words is "two billion, seven hundred sixty-five million, five hundred sixteen thousand, two hundred sixty-one".