139438992186 has 384 divisors, whose sum is σ = 372385382400. Its totient is φ = 38478136320.

The previous prime is 139438992167. The next prime is 139438992227. The reversal of 139438992186 is 681299834931.

139438992186 is a `hidden beast` number, since 1 + 3 + 94 + 389 + 92 + 1 + 86 = 666.

139438992186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

Its product of digits (20155392) is a multiple of the sum of its prime divisors (512).

It is a Curzon number.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 379942575 + ... + 379942941.

It is an arithmetic number, because the mean of its divisors is an integer number (969753600).

Almost surely, 2^139438992186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139438992186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186192691200).

139438992186 is an abundant number, since it is smaller than the sum of its proper divisors (232946390214).

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

139438992186 is a wasteful number, since it uses less digits than its factorization.

139438992186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 512 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The spelling of 139438992186 in words is "one hundred thirty-nine billion, four hundred thirty-eight million, nine hundred ninety-two thousand, one hundred eighty-six".