1663635631712 has 24 divisors (see below), whose sum is σ = 3277678700016. Its totient is φ = 831209295232.

The previous prime is 1663635631663. The next prime is 1663635631717. The reversal of 1663635631712 is 2171365363661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663635631717) 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 3 ways as a sum of consecutive naturals, for example, 18971843 + ... + 19059330.

It is an arithmetic number, because the mean of its divisors is an integer number (136569945834).

Almost surely, 2^{1663635631712} is an apocalyptic number.

It is an amenable number.

1663635631712 is a deficient number, since it is larger than the sum of its proper divisors (1614043068304).

1663635631712 is a wasteful number, since it uses less digits than its factorization.

1663635631712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38032550 (or 38032542 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 50.

The spelling of 1663635631712 in words is "one trillion, six hundred sixty-three billion, six hundred thirty-five million, six hundred thirty-one thousand, seven hundred twelve".