5611780189381 has 2 divisors, whose sum is σ = 5611780189382. Its totient is φ = 5611780189380.

The previous prime is 5611780189363. The next prime is 5611780189439. The reversal of 5611780189381 is 1839810871165.

It is an a-pointer prime, because the next prime (5611780189439) can be obtained adding 5611780189381 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4728302385156 + 883477804225 = 2174466^2 + 939935^2 .

It is a cyclic number.

It is not a de Polignac number, because 5611780189381 - 2²⁷ = 5611645971653 is a prime.

It is a super-2 number, since 2×5611780189381² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5611780189321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805890094690 + 2805890094691.

It is an arithmetic number, because the mean of its divisors is an integer number (2805890094691).

Almost surely, 2^{5611780189381} is an apocalyptic number.

It is an amenable number.

5611780189381 is a deficient number, since it is larger than the sum of its proper divisors (1).

5611780189381 is an equidigital number, since it uses as much as digits as its factorization.

5611780189381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 58.

The spelling of 5611780189381 in words is "five trillion, six hundred eleven billion, seven hundred eighty million, one hundred eighty-nine thousand, three hundred eighty-one".