100491641809 has 8 divisors (see below), whose sum is σ = 109704259112. Its totient is φ = 91490808960.

The previous prime is 100491641777. The next prime is 100491641843. The reversal of 100491641809 is 908146194001.

It can be written as a sum of positive squares in 4 ways, for example, as 21162102784 + 79329539025 = 145472^2 + 281655^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100491641809 - 2⁵ = 100491641777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100491641869) by changing a digit.

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, 52945122 + ... + 52947019.

It is an arithmetic number, because the mean of its divisors is an integer number (13713032389).

Almost surely, 2^100491641809 is an apocalyptic number.

It is an amenable number.

100491641809 is a deficient number, since it is larger than the sum of its proper divisors (9212617303).

100491641809 is a wasteful number, since it uses less digits than its factorization.

100491641809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105892227.

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 100491641809 in words is "one hundred billion, four hundred ninety-one million, six hundred forty-one thousand, eight hundred nine".