187518381668 has 72 divisors (see below), whose sum is σ = 357598644480. Its totient is φ = 85925519680.

The previous prime is 187518381649. The next prime is 187518381683. The reversal of 187518381668 is 866183815781.

It is a self number, because there is not a number n which added to its sum of digits gives 187518381668.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8027021 + ... + 8050347.

It is an arithmetic number, because the mean of its divisors is an integer number (4966647840).

Almost surely, 2^187518381668 is an apocalyptic number.

It is an amenable number.

187518381668 is a deficient number, since it is larger than the sum of its proper divisors (170080262812).

187518381668 is a wasteful number, since it uses less digits than its factorization.

187518381668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23537 (or 23512 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 62.

The spelling of 187518381668 in words is "one hundred eighty-seven billion, five hundred eighteen million, three hundred eighty-one thousand, six hundred sixty-eight".