9281778013648 has 20 divisors (see below), whose sum is σ = 20552508459040. Its totient is φ = 3977904862944.

The previous prime is 9281778013619. The next prime is 9281778013763. The reversal of 9281778013648 is 8463108771829.

It is a self number, because there is not a number n which added to its sum of digits gives 9281778013648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41436508878 + ... + 41436509101.

It is an arithmetic number, because the mean of its divisors is an integer number (1027625422952).

Almost surely, 2^{9281778013648} is an apocalyptic number.

It is an amenable number.

9281778013648 is an abundant number, since it is smaller than the sum of its proper divisors (11270730445392).

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

9281778013648 is a wasteful number, since it uses less digits than its factorization.

9281778013648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82873017994 (or 82873017988 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 64.

The spelling of 9281778013648 in words is "nine trillion, two hundred eighty-one billion, seven hundred seventy-eight million, thirteen thousand, six hundred forty-eight".