11506593669521 has 2 divisors, whose sum is σ = 11506593669522. Its totient is φ = 11506593669520.

The previous prime is 11506593669497. The next prime is 11506593669559. The reversal of 11506593669521 is 12596639560511.

11506593669521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9865284219025 + 1641309450496 = 3140905^2 + 1281136^2 .

It is an emirp because it is prime and its reverse (12596639560511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11506593669521 - 2²² = 11506589475217 is a prime.

It is not a weakly prime, because it can be changed into another prime (11506593669581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5753296834760 + 5753296834761.

It is an arithmetic number, because the mean of its divisors is an integer number (5753296834761).

Almost surely, 2^{11506593669521} is an apocalyptic number.

It is an amenable number.

11506593669521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11506593669521 is an equidigital number, since it uses as much as digits as its factorization.

11506593669521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122000, while the sum is 59.

The spelling of 11506593669521 in words is "eleven trillion, five hundred six billion, five hundred ninety-three million, six hundred sixty-nine thousand, five hundred twenty-one".