991382598096 has 80 divisors (see below), whose sum is σ = 2853341088768. Its totient is φ = 294027068800.

The previous prime is 991382598071. The next prime is 991382598161. The reversal of 991382598096 is 690895283199.

It is a self number, because there is not a number n which added to its sum of digits gives 991382598096.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19949850 + ... + 19999481.

Almost surely, 2^991382598096 is an apocalyptic number.

It is an amenable number.

991382598096 is an abundant number, since it is smaller than the sum of its proper divisors (1861958490672).

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

991382598096 is a wasteful number, since it uses less digits than its factorization.

991382598096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39949400 (or 39949394 counting only the distinct ones).

The product of its (nonzero) digits is 75582720, while the sum is 69.

The spelling of 991382598096 in words is "nine hundred ninety-one billion, three hundred eighty-two million, five hundred ninety-eight thousand, ninety-six".