18090548617 has 2 divisors, whose sum is σ = 18090548618. Its totient is φ = 18090548616.

The previous prime is 18090548591. The next prime is 18090548653. The reversal of 18090548617 is 71684509081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17888795001 + 201753616 = 133749^2 + 14204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18090548617 is a prime.

It is a super-3 number, since 3×18090548617³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (18090545617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9045274308 + 9045274309.

It is an arithmetic number, because the mean of its divisors is an integer number (9045274309).

Almost surely, 2^18090548617 is an apocalyptic number.

It is an amenable number.

18090548617 is a deficient number, since it is larger than the sum of its proper divisors (1).

18090548617 is an equidigital number, since it uses as much as digits as its factorization.

18090548617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 18090548617 in words is "eighteen billion, ninety million, five hundred forty-eight thousand, six hundred seventeen".