187849544489 has 12 divisors (see below), whose sum is σ = 198286853616. Its totient is φ = 177935679288.

The previous prime is 187849544423. The next prime is 187849544501. The reversal of 187849544489 is 984445948781.

It is not a de Polignac number, because 187849544489 - 2¹⁶ = 187849478953 is a prime.

It is a super-2 number, since 2×187849544489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (187849544419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2578802 + ... + 2650644.

It is an arithmetic number, because the mean of its divisors is an integer number (16523904468).

Almost surely, 2^187849544489 is an apocalyptic number.

187849544489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

187849544489 is a deficient number, since it is larger than the sum of its proper divisors (10437309127).

187849544489 is an equidigital number, since it uses as much as digits as its factorization.

187849544489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79124 (or 79105 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 71.

The spelling of 187849544489 in words is "one hundred eighty-seven billion, eight hundred forty-nine million, five hundred forty-four thousand, four hundred eighty-nine".