91819091010 has 16 divisors (see below), whose sum is σ = 220365818496. Its totient is φ = 24485090928.

The previous prime is 91819090967. The next prime is 91819091027. The reversal of 91819091010 is 1019091819.

It is a self number, because there is not a number n which added to its sum of digits gives 91819091010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530318154 + ... + 1530318213.

It is an arithmetic number, because the mean of its divisors is an integer number (13772863656).

Almost surely, 2^91819091010 is an apocalyptic number.

91819091010 is an abundant number, since it is smaller than the sum of its proper divisors (128546727486).

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

91819091010 is a wasteful number, since it uses less digits than its factorization.

91819091010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060636377.

The product of its (nonzero) digits is 5832, while the sum is 39.

The spelling of 91819091010 in words is "ninety-one billion, eight hundred nineteen million, ninety-one thousand, ten".