991301000886 has 192 divisors, whose sum is σ = 2571633792000. Its totient is φ = 269995638528.

The previous prime is 991301000869. The next prime is 991301000887. The reversal of 991301000886 is 688000103199.

991301000886 = 497819² + 497820² + ... + 497822².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991301000887) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 131346565 + ... + 131354111.

It is an arithmetic number, because the mean of its divisors is an integer number (13393926000).

Almost surely, 2^991301000886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 991301000886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1285816896000).

991301000886 is an abundant number, since it is smaller than the sum of its proper divisors (1580332791114).

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

991301000886 is a wasteful number, since it uses less digits than its factorization.

991301000886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8043 (or 8040 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 991301000886 in words is "nine hundred ninety-one billion, three hundred one million, eight hundred eighty-six", and thus it is an aban number.