90531454732517 has 2 divisors, whose sum is σ = 90531454732518. Its totient is φ = 90531454732516.

The previous prime is 90531454732391. The next prime is 90531454732571. The reversal of 90531454732517 is 71523745413509.

It is a happy number.

Together with next prime (90531454732571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75264664621441 + 15266790111076 = 8675521^2 + 3907274^2 .

It is an emirp because it is prime and its reverse (71523745413509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90531454732517 - 2²⁰ = 90531453683941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90531454132517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45265727366258 + 45265727366259.

It is an arithmetic number, because the mean of its divisors is an integer number (45265727366259).

Almost surely, 2^{90531454732517} is an apocalyptic number.

It is an amenable number.

90531454732517 is a deficient number, since it is larger than the sum of its proper divisors (1).

90531454732517 is an equidigital number, since it uses as much as digits as its factorization.

90531454732517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876000, while the sum is 56.

The spelling of 90531454732517 in words is "ninety trillion, five hundred thirty-one billion, four hundred fifty-four million, seven hundred thirty-two thousand, five hundred seventeen".