185130371808 has 144 divisors (see below), whose sum is σ = 544167514800. Its totient is φ = 59669360640.

The previous prime is 185130371779. The next prime is 185130371827. The reversal of 185130371808 is 808173031581.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 947208 + ... + 1125816.

It is an arithmetic number, because the mean of its divisors is an integer number (3778941075).

Almost surely, 2^185130371808 is an apocalyptic number.

185130371808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 185130371808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272083757400).

185130371808 is an abundant number, since it is smaller than the sum of its proper divisors (359037142992).

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

185130371808 is a wasteful number, since it uses less digits than its factorization.

185130371808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178745 (or 178734 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 185130371808 in words is "one hundred eighty-five billion, one hundred thirty million, three hundred seventy-one thousand, eight hundred eight".