100191091008 has 56 divisors (see below), whose sum is σ = 265925332512. Its totient is φ = 33291656704.

The previous prime is 100191090983. The next prime is 100191091043. The reversal of 100191091008 is 800190191001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762210 + ... + 883937.

It is an arithmetic number, because the mean of its divisors is an integer number (4748666652).

Almost surely, 2^100191091008 is an apocalyptic number.

It is an amenable number.

100191091008 is an abundant number, since it is smaller than the sum of its proper divisors (165734241504).

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

100191091008 is a wasteful number, since it uses less digits than its factorization.

100191091008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646479 (or 1646469 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 100191091008 in words is "one hundred billion, one hundred ninety-one million, ninety-one thousand, eight".