90544691513 has 2 divisors, whose sum is σ = 90544691514. Its totient is φ = 90544691512.

The previous prime is 90544691443. The next prime is 90544691521. The reversal of 90544691513 is 31519644509.

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., 53769725689 + 36774965824 = 231883^2 + 191768^2 .

It is an emirp because it is prime and its reverse (31519644509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90544691513 - 2¹⁸ = 90544429369 is a prime.

It is a super-2 number, since 2×90544691513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90544691533) 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, 45272345756 + 45272345757.

It is an arithmetic number, because the mean of its divisors is an integer number (45272345757).

Almost surely, 2^90544691513 is an apocalyptic number.

It is an amenable number.

90544691513 is a deficient number, since it is larger than the sum of its proper divisors (1).

90544691513 is an equidigital number, since it uses as much as digits as its factorization.

90544691513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 90544691513 in words is "ninety billion, five hundred forty-four million, six hundred ninety-one thousand, five hundred thirteen".