2188385201720 has 32 divisors (see below), whose sum is σ = 5093655213600. Its totient is φ = 845169456768.

The previous prime is 2188385201693. The next prime is 2188385201767. The reversal of 2188385201720 is 271025838812.

It is a super-2 number, since 2×2188385201720² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 943268324 + ... + 943270643.

It is an arithmetic number, because the mean of its divisors is an integer number (159176725425).

Almost surely, 2^{2188385201720} is an apocalyptic number.

2188385201720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2188385201720 is an abundant number, since it is smaller than the sum of its proper divisors (2905270011880).

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

2188385201720 is a wasteful number, since it uses less digits than its factorization.

2188385201720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886539007 (or 1886539003 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 2188385201720 in words is "two trillion, one hundred eighty-eight billion, three hundred eighty-five million, two hundred one thousand, seven hundred twenty".