91208050100 has 18 divisors (see below), whose sum is σ = 197921468934. Its totient is φ = 36483220000.

The previous prime is 91208050097. The next prime is 91208050159. The reversal of 91208050100 is 105080219.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1000330384 + 90207719716 = 31628^2 + 300346^2 .

It is a super-2 number, since 2×91208050100² (a number of 23 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 91208050100.

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 5 ways as a sum of consecutive naturals, for example, 456040151 + ... + 456040350.

It is an arithmetic number, because the mean of its divisors is an integer number (10995637163).

Almost surely, 2^91208050100 is an apocalyptic number.

It is an amenable number.

91208050100 is an abundant number, since it is smaller than the sum of its proper divisors (106713418834).

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

91208050100 is a wasteful number, since it uses less digits than its factorization.

91208050100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912080515 (or 912080508 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 91208050100 in words is "ninety-one billion, two hundred eight million, fifty thousand, one hundred".