1097782640768 has 72 divisors (see below), whose sum is σ = 2404165875615. Its totient is φ = 498932839680.

The previous prime is 1097782640729. The next prime is 1097782640777. The reversal of 1097782640768 is 8670462877901.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 548891320384 + 548891320384 = 740872^2 + 740872^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=740872.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 130389263 + ... + 130397681.

Almost surely, 2^{1097782640768} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1097782640768

1097782640768 is an abundant number, since it is smaller than the sum of its proper divisors (1306383234847).

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

1097782640768 is an frugal number, since it uses more digits than its factorization.

1097782640768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16874 (or 8432 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 65.

The spelling of 1097782640768 in words is "one trillion, ninety-seven billion, seven hundred eighty-two million, six hundred forty thousand, seven hundred sixty-eight".