1663246808138 has 8 divisors (see below), whose sum is σ = 2494876567680. Its totient is φ = 831621285580.

The previous prime is 1663246808081. The next prime is 1663246808141. The reversal of 1663246808138 is 8318086423661.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 241703 + ... + 1839813.

It is an arithmetic number, because the mean of its divisors is an integer number (311859570960).

Almost surely, 2^{1663246808138} is an apocalyptic number.

1663246808138 is a deficient number, since it is larger than the sum of its proper divisors (831629759542).

1663246808138 is a wasteful number, since it uses less digits than its factorization.

1663246808138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118492.

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 1663246808138 in words is "one trillion, six hundred sixty-three billion, two hundred forty-six million, eight hundred eight thousand, one hundred thirty-eight".