5188038747781 has 2 divisors, whose sum is σ = 5188038747782. Its totient is φ = 5188038747780.

The previous prime is 5188038747701. The next prime is 5188038747877. The reversal of 5188038747781 is 1877478308815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2850323124100 + 2337715623681 = 1688290^2 + 1528959^2 .

It is a cyclic number.

It is not a de Polignac number, because 5188038747781 - 2³⁷ = 5050599794309 is a prime.

It is a super-2 number, since 2×5188038747781² (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 (5188038747701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2594019373890 + 2594019373891.

It is an arithmetic number, because the mean of its divisors is an integer number (2594019373891).

Almost surely, 2^{5188038747781} is an apocalyptic number.

It is an amenable number.

5188038747781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5188038747781 is an equidigital number, since it uses as much as digits as its factorization.

5188038747781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84295680, while the sum is 67.

The spelling of 5188038747781 in words is "five trillion, one hundred eighty-eight billion, thirty-eight million, seven hundred forty-seven thousand, seven hundred eighty-one".