2189729353140 has 144 divisors (see below), whose sum is σ = 7594249703040. Its totient is φ = 500299372800.

The previous prime is 2189729353121. The next prime is 2189729353181. The reversal of 2189729353140 is 413539279812.

2189729353140 is a `hidden beast` number, since 2 + 1 + 89 + 7 + 29 + 3 + 531 + 4 + 0 = 666.

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 47 ways as a sum of consecutive naturals, for example, 2646415 + ... + 3373865.

It is an arithmetic number, because the mean of its divisors is an integer number (52737845160).

Almost surely, 2^{2189729353140} is an apocalyptic number.

2189729353140 is a gapful number since it is divisible by the number (20) 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 2189729353140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3797124851520).

2189729353140 is an abundant number, since it is smaller than the sum of its proper divisors (5404520349900).

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

2189729353140 is a wasteful number, since it uses less digits than its factorization.

2189729353140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729862 (or 729857 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 2189729353140 in words is "two trillion, one hundred eighty-nine billion, seven hundred twenty-nine million, three hundred fifty-three thousand, one hundred forty".