918191009192 has 16 divisors (see below), whose sum is σ = 1754091315540. Its totient is φ = 450433325056.

The previous prime is 918191009179. The next prime is 918191009233. The reversal of 918191009192 is 291900191819.

It can be written as a sum of positive squares in 2 ways, for example, as 901956681796 + 16234327396 = 949714^2 + 127414^2 .

It is a super-2 number, since 2×918191009192² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 918191009192.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082771993 + ... + 1082772840.

Almost surely, 2^918191009192 is an apocalyptic number.

It is an amenable number.

918191009192 is a deficient number, since it is larger than the sum of its proper divisors (835900306348).

918191009192 is a wasteful number, since it uses less digits than its factorization.

918191009192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165544892 (or 2165544888 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 50.

It can be divided in two parts, 91819 and 1009192, that added together give a palindrome (1101011).

The spelling of 918191009192 in words is "nine hundred eighteen billion, one hundred ninety-one million, nine thousand, one hundred ninety-two".