91819050500 has 24 divisors (see below), whose sum is σ = 200532807384. Its totient is φ = 36727620000.

The previous prime is 91819050451. The next prime is 91819050503. The reversal of 91819050500 is 505091819.

It can be written as a sum of positive squares in 4 ways, for example, as 29441476 + 91789609024 = 5426^2 + 302968^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91819050503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91818551 + ... + 91819550.

It is an arithmetic number, because the mean of its divisors is an integer number (8355533641).

Almost surely, 2^91819050500 is an apocalyptic number.

It is an amenable number.

91819050500 is an abundant number, since it is smaller than the sum of its proper divisors (108713756884).

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

91819050500 is a wasteful number, since it uses less digits than its factorization.

91819050500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183638120 (or 183638108 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 38.

The spelling of 91819050500 in words is "ninety-one billion, eight hundred nineteen million, fifty thousand, five hundred".