187649984473771 has 4 divisors (see below), whose sum is σ = 192013937601112. Its totient is φ = 183286031346432.

The previous prime is 187649984473739. The next prime is 187649984473789. The reversal of 187649984473771 is 177374489946781.

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

It is a cyclic number.

It is not a de Polignac number, because 187649984473771 - 2⁵ = 187649984473739 is a prime.

It is the 49-th Jacobsthal number.

It is a Duffinian number.

It is a plaindrome in base 4 and base 16.

It is not an unprimeable number, because it can be changed into a prime (187649984476771) 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, 2181976563606 + ... + 2181976563691.

It is an arithmetic number, because the mean of its divisors is an integer number (48003484400278).

Almost surely, 2^{187649984473771} is an apocalyptic number.

187649984473771 is a deficient number, since it is larger than the sum of its proper divisors (4363953127341).

187649984473771 is an equidigital number, since it uses as much as digits as its factorization.

187649984473771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363953127340.

The product of its digits is 14338695168, while the sum is 85.

The spelling of 187649984473771 in words is "one hundred eighty-seven trillion, six hundred forty-nine billion, nine hundred eighty-four million, four hundred seventy-three thousand, seven hundred seventy-one".