2101788366390 has 256 divisors, whose sum is σ = 5906595168000. Its totient is φ = 531058913280.

The previous prime is 2101788366389. The next prime is 2101788366421. The reversal of 2101788366390 is 936638871012.

2101788366390 is a `hidden beast` number, since 2 + 1 + 0 + 178 + 83 + 6 + 6 + 390 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 218272096 + ... + 218281724.

It is an arithmetic number, because the mean of its divisors is an integer number (23072637375).

Almost surely, 2^{2101788366390} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101788366390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2953297584000).

2101788366390 is an abundant number, since it is smaller than the sum of its proper divisors (3804806801610).

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

2101788366390 is a wasteful number, since it uses less digits than its factorization.

2101788366390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10192 (or 10186 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 2101788366390 in words is "two trillion, one hundred one billion, seven hundred eighty-eight million, three hundred sixty-six thousand, three hundred ninety".