1136621066561 has 2 divisors, whose sum is σ = 1136621066562. Its totient is φ = 1136621066560.

The previous prime is 1136621066513. The next prime is 1136621066573. The reversal of 1136621066561 is 1656601266311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1048895512336 + 87725554225 = 1024156^2 + 296185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1136621066561 - 2²⁶ = 1136553957697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1136621063561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568310533280 + 568310533281.

It is an arithmetic number, because the mean of its divisors is an integer number (568310533281).

Almost surely, 2^{1136621066561} is an apocalyptic number.

It is an amenable number.

1136621066561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1136621066561 is an equidigital number, since it uses as much as digits as its factorization.

1136621066561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 1136621066561 in words is "one trillion, one hundred thirty-six billion, six hundred twenty-one million, sixty-six thousand, five hundred sixty-one".