1152438716521 has 2 divisors, whose sum is σ = 1152438716522. Its totient is φ = 1152438716520.

The previous prime is 1152438716501. The next prime is 1152438716537. The reversal of 1152438716521 is 1256178342511.

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., 1122911105625 + 29527610896 = 1059675^2 + 171836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1152438716521 - 2¹¹ = 1152438714473 is a prime.

It is a super-2 number, since 2×1152438716521² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1152438716501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576219358260 + 576219358261.

It is an arithmetic number, because the mean of its divisors is an integer number (576219358261).

Almost surely, 2^{1152438716521} is an apocalyptic number.

It is an amenable number.

1152438716521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1152438716521 is an equidigital number, since it uses as much as digits as its factorization.

1152438716521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 46.

The spelling of 1152438716521 in words is "one trillion, one hundred fifty-two billion, four hundred thirty-eight million, seven hundred sixteen thousand, five hundred twenty-one".