187228815541620 has 144 divisors (see below), whose sum is σ = 545446348973568. Its totient is φ = 47936656293120.

The previous prime is 187228815541561. The next prime is 187228815541633. The reversal of 187228815541620 is 26145518822781.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26879454 + ... + 33120426.

It is an arithmetic number, because the mean of its divisors is an integer number (3787821867872).

Almost surely, 2^{187228815541620} is an apocalyptic number.

187228815541620 is a gapful number since it is divisible by the number (10) 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 187228815541620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272723174486784).

187228815541620 is an abundant number, since it is smaller than the sum of its proper divisors (358217533431948).

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

187228815541620 is a wasteful number, since it uses less digits than its factorization.

187228815541620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6241270 (or 6241141 counting only the distinct ones).

The product of its (nonzero) digits is 17203200, while the sum is 60.

The spelling of 187228815541620 in words is "one hundred eighty-seven trillion, two hundred twenty-eight billion, eight hundred fifteen million, five hundred forty-one thousand, six hundred twenty".