1663985046756 has 12 divisors (see below), whose sum is σ = 3882631775792. Its totient is φ = 554661682248.

The previous prime is 1663985046743. The next prime is 1663985046761. The reversal of 1663985046756 is 6576405893661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1663985046756² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69332710270 + ... + 69332710293.

Almost surely, 2^{1663985046756} is an apocalyptic number.

It is an amenable number.

1663985046756 is an abundant number, since it is smaller than the sum of its proper divisors (2218646729036).

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

1663985046756 is a wasteful number, since it uses less digits than its factorization.

1663985046756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138665420570 (or 138665420568 counting only the distinct ones).

The product of its (nonzero) digits is 195955200, while the sum is 66.

The spelling of 1663985046756 in words is "one trillion, six hundred sixty-three billion, nine hundred eighty-five million, forty-six thousand, seven hundred fifty-six".