991282651112 has 64 divisors (see below), whose sum is σ = 2009068624080. Its totient is φ = 455816005632.

The previous prime is 991282651067. The next prime is 991282651159. The reversal of 991282651112 is 211156282199.

It can be written as a sum of positive squares in 8 ways, for example, as 75238276 + 991207412836 = 8674^2 + 995594^2 .

It is a super-3 number, since 3×991282651112³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72812018 + ... + 72825630.

Almost surely, 2^991282651112 is an apocalyptic number.

It is an amenable number.

991282651112 is an abundant number, since it is smaller than the sum of its proper divisors (1017785972968).

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

991282651112 is a wasteful number, since it uses less digits than its factorization.

991282651112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16182 (or 16178 counting only the distinct ones).

The product of its digits is 155520, while the sum is 47.

The spelling of 991282651112 in words is "nine hundred ninety-one billion, two hundred eighty-two million, six hundred fifty-one thousand, one hundred twelve".