2765027765021 has 2 divisors, whose sum is σ = 2765027765022. Its totient is φ = 2765027765020.

The previous prime is 2765027765011. The next prime is 2765027765053. The reversal of 2765027765021 is 1205677205672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2194587439396 + 570440325625 = 1481414^2 + 755275^2 .

It is a cyclic number.

It is not a de Polignac number, because 2765027765021 - 2¹⁸ = 2765027502877 is a prime.

It is a super-2 number, since 2×2765027765021² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2765027765011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382513882510 + 1382513882511.

It is an arithmetic number, because the mean of its divisors is an integer number (1382513882511).

Almost surely, 2^{2765027765021} is an apocalyptic number.

It is an amenable number.

2765027765021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2765027765021 is an equidigital number, since it uses as much as digits as its factorization.

2765027765021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 50.

The spelling of 2765027765021 in words is "two trillion, seven hundred sixty-five billion, twenty-seven million, seven hundred sixty-five thousand, twenty-one".