918930855517 has 2 divisors, whose sum is σ = 918930855518. Its totient is φ = 918930855516.

The previous prime is 918930855487. The next prime is 918930855523. The reversal of 918930855517 is 715558039819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583656272676 + 335274582841 = 763974^2 + 579029^2 .

It is a cyclic number.

It is not a de Polignac number, because 918930855517 - 2¹¹ = 918930853469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918930855217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459465427758 + 459465427759.

It is an arithmetic number, because the mean of its divisors is an integer number (459465427759).

Almost surely, 2^918930855517 is an apocalyptic number.

It is an amenable number.

918930855517 is a deficient number, since it is larger than the sum of its proper divisors (1).

918930855517 is an equidigital number, since it uses as much as digits as its factorization.

918930855517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608000, while the sum is 61.

The spelling of 918930855517 in words is "nine hundred eighteen billion, nine hundred thirty million, eight hundred fifty-five thousand, five hundred seventeen".