2101680442539 has 12 divisors (see below), whose sum is σ = 3035773734136. Its totient is φ = 1401114251232.

The previous prime is 2101680442487. The next prime is 2101680442583. The reversal of 2101680442539 is 9352440861012.

2101680442539 is a `hidden beast` number, since 2 + 10 + 1 + 68 + 0 + 4 + 42 + 539 = 666.

It is not a de Polignac number, because 2101680442539 - 2⁹ = 2101680442027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101680442494 and 2101680442503.

It is not an unprimeable number, because it can be changed into a prime (2101680443539) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2932719 + ... + 3578295.

Almost surely, 2^{2101680442539} is an apocalyptic number.

2101680442539 is a deficient number, since it is larger than the sum of its proper divisors (934093291597).

2101680442539 is a wasteful number, since it uses less digits than its factorization.

2101680442539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007306 (or 1007303 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 2101680442539 in words is "two trillion, one hundred one billion, six hundred eighty million, four hundred forty-two thousand, five hundred thirty-nine".