187720705668 has 96 divisors (see below), whose sum is σ = 450259689600. Its totient is φ = 60852363264.

The previous prime is 187720705657. The next prime is 187720705693. The reversal of 187720705668 is 866507027781.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29545180 + ... + 29551532.

It is an arithmetic number, because the mean of its divisors is an integer number (4690205100).

Almost surely, 2^187720705668 is an apocalyptic number.

It is an amenable number.

187720705668 is an abundant number, since it is smaller than the sum of its proper divisors (262538983932).

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

187720705668 is a wasteful number, since it uses less digits than its factorization.

187720705668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6901 (or 6899 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 187720705668 in words is "one hundred eighty-seven billion, seven hundred twenty million, seven hundred five thousand, six hundred sixty-eight".