1983864640512 has 88 divisors (see below), whose sum is σ = 5566023901600. Its totient is φ = 626483552256.

The previous prime is 1983864640507. The next prime is 1983864640523. The reversal of 1983864640512 is 2150464683891.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

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, 16936087 + ... + 17052822.

Almost surely, 2^{1983864640512} is an apocalyptic number.

1983864640512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1983864640512 is an abundant number, since it is smaller than the sum of its proper divisors (3582159261088).

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

1983864640512 is a wasteful number, since it uses less digits than its factorization.

1983864640512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33988951 (or 33988933 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 1983864640512 in words is "one trillion, nine hundred eighty-three billion, eight hundred sixty-four million, six hundred forty thousand, five hundred twelve".