52128234688781 has 2 divisors, whose sum is σ = 52128234688782. Its totient is φ = 52128234688780.

The previous prime is 52128234688729. The next prime is 52128234688807. The reversal of 52128234688781 is 18788643282125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49921996802500 + 2206237886281 = 7065550^2 + 1485341^2 .

It is a cyclic number.

It is not a de Polignac number, because 52128234688781 - 2¹⁰ = 52128234687757 is a prime.

It is a super-2 number, since 2×52128234688781² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52128234688381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26064117344390 + 26064117344391.

It is an arithmetic number, because the mean of its divisors is an integer number (26064117344391).

Almost surely, 2^{52128234688781} is an apocalyptic number.

It is an amenable number.

52128234688781 is a deficient number, since it is larger than the sum of its proper divisors (1).

52128234688781 is an equidigital number, since it uses as much as digits as its factorization.

52128234688781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82575360, while the sum is 65.

The spelling of 52128234688781 in words is "fifty-two trillion, one hundred twenty-eight billion, two hundred thirty-four million, six hundred eighty-eight thousand, seven hundred eighty-one".