918190909969 has 2 divisors, whose sum is σ = 918190909970. Its totient is φ = 918190909968.

The previous prime is 918190909903. The next prime is 918190909991. The reversal of 918190909969 is 969909091819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917610726400 + 580183569 = 957920^2 + 24087^2 .

It is a cyclic number.

It is not a de Polignac number, because 918190909969 - 2⁷ = 918190909841 is a prime.

It is a super-2 number, since 2×918190909969² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 918190909898 and 918190909907.

It is not a weakly prime, because it can be changed into another prime (918190909369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459095454984 + 459095454985.

It is an arithmetic number, because the mean of its divisors is an integer number (459095454985).

Almost surely, 2^918190909969 is an apocalyptic number.

It is an amenable number.

918190909969 is a deficient number, since it is larger than the sum of its proper divisors (1).

918190909969 is an equidigital number, since it uses as much as digits as its factorization.

918190909969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25509168, while the sum is 70.

The spelling of 918190909969 in words is "nine hundred eighteen billion, one hundred ninety million, nine hundred nine thousand, nine hundred sixty-nine".