2608548875561 has 2 divisors, whose sum is σ = 2608548875562. Its totient is φ = 2608548875560.

The previous prime is 2608548875479. The next prime is 2608548875567. The reversal of 2608548875561 is 1655788458062.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1623802261225 + 984746614336 = 1274285^2 + 992344^2 .

It is a cyclic number.

It is not a de Polignac number, because 2608548875561 - 2¹⁰ = 2608548874537 is a prime.

It is not a weakly prime, because it can be changed into another prime (2608548875567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304274437780 + 1304274437781.

It is an arithmetic number, because the mean of its divisors is an integer number (1304274437781).

Almost surely, 2^{2608548875561} is an apocalyptic number.

It is an amenable number.

2608548875561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2608548875561 is an equidigital number, since it uses as much as digits as its factorization.

2608548875561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024000, while the sum is 65.

The spelling of 2608548875561 in words is "two trillion, six hundred eight billion, five hundred forty-eight million, eight hundred seventy-five thousand, five hundred sixty-one".