186813917139 has 4 divisors (see below), whose sum is σ = 249085222856. Its totient is φ = 124542611424.

The previous prime is 186813917137. The next prime is 186813917159. The reversal of 186813917139 is 931719318681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 186813917139 - 2¹ = 186813917137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (186813917137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31135652854 + ... + 31135652859.

It is an arithmetic number, because the mean of its divisors is an integer number (62271305714).

Almost surely, 2^186813917139 is an apocalyptic number.

186813917139 is a deficient number, since it is larger than the sum of its proper divisors (62271305717).

186813917139 is an equidigital number, since it uses as much as digits as its factorization.

186813917139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62271305716.

The product of its digits is 1959552, while the sum is 57.

The spelling of 186813917139 in words is "one hundred eighty-six billion, eight hundred thirteen million, nine hundred seventeen thousand, one hundred thirty-nine".