90368145209 has 2 divisors, whose sum is σ = 90368145210. Its totient is φ = 90368145208.

The previous prime is 90368145103. The next prime is 90368145251. The reversal of 90368145209 is 90254186309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76063985209 + 14304160000 = 275797^2 + 119600^2 .

It is a cyclic number.

It is not a de Polignac number, because 90368145209 - 2¹⁶ = 90368079673 is a prime.

It is not a weakly prime, because it can be changed into another prime (90368145509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45184072604 + 45184072605.

It is an arithmetic number, because the mean of its divisors is an integer number (45184072605).

Almost surely, 2^90368145209 is an apocalyptic number.

It is an amenable number.

90368145209 is a deficient number, since it is larger than the sum of its proper divisors (1).

90368145209 is an equidigital number, since it uses as much as digits as its factorization.

90368145209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 90368145209 in words is "ninety billion, three hundred sixty-eight million, one hundred forty-five thousand, two hundred nine".