2765198505689 has 2 divisors, whose sum is σ = 2765198505690. Its totient is φ = 2765198505688.

The previous prime is 2765198505649. The next prime is 2765198505703. The reversal of 2765198505689 is 9865058915672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1386722918464 + 1378475587225 = 1177592^2 + 1174085^2 .

It is a cyclic number.

It is not a de Polignac number, because 2765198505689 - 2³⁶ = 2696479028953 is a prime.

It is not a weakly prime, because it can be changed into another prime (2765198505649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382599252844 + 1382599252845.

It is an arithmetic number, because the mean of its divisors is an integer number (1382599252845).

Almost surely, 2^{2765198505689} is an apocalyptic number.

It is an amenable number.

2765198505689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2765198505689 is an equidigital number, since it uses as much as digits as its factorization.

2765198505689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592000, while the sum is 71.

The spelling of 2765198505689 in words is "two trillion, seven hundred sixty-five billion, one hundred ninety-eight million, five hundred five thousand, six hundred eighty-nine".