1023989784064 has 80 divisors (see below), whose sum is σ = 2226079115568. Its totient is φ = 467738099712.

The previous prime is 1023989784061. The next prime is 1023989784107. The reversal of 1023989784064 is 4604879893201.

It is a junction number, because it is equal to n+sod(n) for n = 1023989783993 and 1023989784011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023989784061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147382 + ... + 1438645.

Almost surely, 2^{1023989784064} is an apocalyptic number.

It is an amenable number.

1023989784064 is an abundant number, since it is smaller than the sum of its proper divisors (1202089331504).

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

1023989784064 is an equidigital number, since it uses as much as digits as its factorization.

1023989784064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586155 (or 1586139 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 1023989784064 in words is "one trillion, twenty-three billion, nine hundred eighty-nine million, seven hundred eighty-four thousand, sixty-four".