1659127961656 has 96 divisors (see below), whose sum is σ = 3441671568720. Its totient is φ = 749248980480.

The previous prime is 1659127961627. The next prime is 1659127961693. The reversal of 1659127961656 is 6561697219561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93007170 + ... + 93025006.

Almost surely, 2^{1659127961656} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1659127961656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1720835784360).

1659127961656 is an abundant number, since it is smaller than the sum of its proper divisors (1782543607064).

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

1659127961656 is a wasteful number, since it uses less digits than its factorization.

1659127961656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18485 (or 18470 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 64.

The spelling of 1659127961656 in words is "one trillion, six hundred fifty-nine billion, one hundred twenty-seven million, nine hundred sixty-one thousand, six hundred fifty-six".