2765650561 has 2 divisors, whose sum is σ = 2765650562. Its totient is φ = 2765650560.

The previous prime is 2765650543. The next prime is 2765650637. The reversal of 2765650561 is 1650565672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2537036161 + 228614400 = 50369^2 + 15120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2765650561 - 2¹¹ = 2765648513 is a prime.

It is a super-2 number, since 2×2765650561² = 15297646051119229442, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2765650541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382825280 + 1382825281.

It is an arithmetic number, because the mean of its divisors is an integer number (1382825281).

Almost surely, 2^2765650561 is an apocalyptic number.

It is an amenable number.

2765650561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2765650561 is an equidigital number, since it uses as much as digits as its factorization.

2765650561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 43.

The square root of 2765650561 is about 52589.4529444831. The cubic root of 2765650561 is about 1403.6724264056.

The spelling of 2765650561 in words is "two billion, seven hundred sixty-five million, six hundred fifty thousand, five hundred sixty-one".