186681148542 has 72 divisors (see below), whose sum is σ = 470744703000. Its totient is φ = 53311170528.

The previous prime is 186681148529. The next prime is 186681148543. The reversal of 186681148542 is 245841186681.

186681148542 is a `hidden beast` number, since 1 + 8 + 6 + 6 + 81 + 14 + 8 + 542 = 666.

186681148542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186681148543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1773709 + ... + 1876007.

It is an arithmetic number, because the mean of its divisors is an integer number (6538120875).

Almost surely, 2^186681148542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 186681148542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235372351500).

186681148542 is an abundant number, since it is smaller than the sum of its proper divisors (284063554458).

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

186681148542 is a wasteful number, since it uses less digits than its factorization.

186681148542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104390 (or 104380 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 54.

The spelling of 186681148542 in words is "one hundred eighty-six billion, six hundred eighty-one million, one hundred forty-eight thousand, five hundred forty-two".