918191909100 has 72 divisors (see below), whose sum is σ = 2656935375808. Its totient is φ = 244823515200.

The previous prime is 918191909099. The next prime is 918191909123. The reversal of 918191909100 is 1909191819.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 918191909100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2558967 + ... + 2895633.

Almost surely, 2^918191909100 is an apocalyptic number.

It is an amenable number.

918191909100 is an abundant number, since it is smaller than the sum of its proper divisors (1738743466708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

918191909100 is a wasteful number, since it uses less digits than its factorization.

918191909100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345775 (or 345768 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 48.

The spelling of 918191909100 in words is "nine hundred eighteen billion, one hundred ninety-one million, nine hundred nine thousand, one hundred".