2131661683648 has 112 divisors (see below), whose sum is σ = 5388079322880. Its totient is φ = 814575661056.

The previous prime is 2131661683589. The next prime is 2131661683721. The reversal of 2131661683648 is 8463861661312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7220890 + ... + 7510297.

Almost surely, 2^{2131661683648} is an apocalyptic number.

2131661683648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2131661683648 is an abundant number, since it is smaller than the sum of its proper divisors (3256417639232).

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

2131661683648 is a wasteful number, since it uses less digits than its factorization.

2131661683648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14731242 (or 14731232 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The spelling of 2131661683648 in words is "two trillion, one hundred thirty-one billion, six hundred sixty-one million, six hundred eighty-three thousand, six hundred forty-eight".