91820982100 has 18 divisors (see below), whose sum is σ = 199251531374. Its totient is φ = 36728392800.

The previous prime is 91820982089. The next prime is 91820982103. The reversal of 91820982100 is 128902819.

It can be written as a sum of positive squares in 3 ways, for example, as 561405636 + 91259576464 = 23694^2 + 302092^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91820982103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459104811 + ... + 459105010.

Almost surely, 2^91820982100 is an apocalyptic number.

It is an amenable number.

91820982100 is an abundant number, since it is smaller than the sum of its proper divisors (107430549274).

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

91820982100 is a wasteful number, since it uses less digits than its factorization.

91820982100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918209835 (or 918209828 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 91820982100 in words is "ninety-one billion, eight hundred twenty million, nine hundred eighty-two thousand, one hundred".