187681379886 has 256 divisors, whose sum is σ = 561821460480. Its totient is φ = 44850723840.

The previous prime is 187681379867. The next prime is 187681379923. The reversal of 187681379886 is 688973186781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16913356 + ... + 16924448.

It is an arithmetic number, because the mean of its divisors is an integer number (2194615080).

Almost surely, 2^187681379886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187681379886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280910730240).

187681379886 is an abundant number, since it is smaller than the sum of its proper divisors (374140080594).

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

187681379886 is a wasteful number, since it uses less digits than its factorization.

187681379886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11448 (or 11442 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 72.

The spelling of 187681379886 in words is "one hundred eighty-seven billion, six hundred eighty-one million, three hundred seventy-nine thousand, eight hundred eighty-six".