186993219816 has 128 divisors (see below), whose sum is σ = 583702560000. Its totient is φ = 55034774784.

The previous prime is 186993219811. The next prime is 186993219817. The reversal of 186993219816 is 618912399681.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (186993219811) by changing a digit.

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, 1383091 + ... + 1512258.

It is an arithmetic number, because the mean of its divisors is an integer number (4560176250).

Almost surely, 2^186993219816 is an apocalyptic number.

It is an amenable number.

186993219816 is an abundant number, since it is smaller than the sum of its proper divisors (396709340184).

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

186993219816 is a wasteful number, since it uses less digits than its factorization.

186993219816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895400 (or 2895390 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The spelling of 186993219816 in words is "one hundred eighty-six billion, nine hundred ninety-three million, two hundred nineteen thousand, eight hundred sixteen".