9281778013649 has 8 divisors (see below), whose sum is σ = 9542645805792. Its totient is φ = 9022956243840.

The previous prime is 9281778013619. The next prime is 9281778013763. The reversal of 9281778013649 is 9463108771829.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9281778013649 - 2⁸ = 9281778013393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9281778013619) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 511496384 + ... + 511514529.

It is an arithmetic number, because the mean of its divisors is an integer number (1192830725724).

Almost surely, 2^{9281778013649} is an apocalyptic number.

It is an amenable number.

9281778013649 is a deficient number, since it is larger than the sum of its proper divisors (260867792143).

9281778013649 is a wasteful number, since it uses less digits than its factorization.

9281778013649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023011167.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 9281778013649 in words is "nine trillion, two hundred eighty-one billion, seven hundred seventy-eight million, thirteen thousand, six hundred forty-nine".