1663285157988 has 24 divisors (see below), whose sum is σ = 3881080506240. Its totient is φ = 554416699680.

The previous prime is 1663285157971. The next prime is 1663285157993. The reversal of 1663285157988 is 8897515823661.

It is a super-2 number, since 2×1663285157988² (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 7 ways as a sum of consecutive naturals, for example, 857803 + ... + 2015538.

It is an arithmetic number, because the mean of its divisors is an integer number (161711687760).

Almost surely, 2^{1663285157988} is an apocalyptic number.

It is an amenable number.

1663285157988 is an abundant number, since it is smaller than the sum of its proper divisors (2217795348252).

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

1663285157988 is a wasteful number, since it uses less digits than its factorization.

1663285157988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921587 (or 2921585 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 69.

The spelling of 1663285157988 in words is "one trillion, six hundred sixty-three billion, two hundred eighty-five million, one hundred fifty-seven thousand, nine hundred eighty-eight".