91284349688 has 48 divisors (see below), whose sum is σ = 199169561880. Its totient is φ = 39108656832.

The previous prime is 91284349657. The next prime is 91284349691. The reversal of 91284349688 is 88694348219.

It is a Cunningham number, because it is equal to 302133²-1.

It is a super-2 number, since 2×91284349688² (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 91284349688.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1170770 + ... + 1246302.

Almost surely, 2^91284349688 is an apocalyptic number.

91284349688 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

91284349688 is an abundant number, since it is smaller than the sum of its proper divisors (107885212192).

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

91284349688 is a wasteful number, since it uses less digits than its factorization.

91284349688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78636 (or 78625 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 62.

The spelling of 91284349688 in words is "ninety-one billion, two hundred eighty-four million, three hundred forty-nine thousand, six hundred eighty-eight".