538520438377 has 2 divisors, whose sum is σ = 538520438378. Its totient is φ = 538520438376.

The previous prime is 538520438299. The next prime is 538520438387. The reversal of 538520438377 is 773834025835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 535441964121 + 3078474256 = 731739^2 + 55484^2 .

It is a cyclic number.

It is not a de Polignac number, because 538520438377 - 2²³ = 538512049769 is a prime.

It is not a weakly prime, because it can be changed into another prime (538520438387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269260219188 + 269260219189.

It is an arithmetic number, because the mean of its divisors is an integer number (269260219189).

Almost surely, 2^538520438377 is an apocalyptic number.

It is an amenable number.

538520438377 is a deficient number, since it is larger than the sum of its proper divisors (1).

538520438377 is an equidigital number, since it uses as much as digits as its factorization.

538520438377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16934400, while the sum is 55.

The spelling of 538520438377 in words is "five hundred thirty-eight billion, five hundred twenty million, four hundred thirty-eight thousand, three hundred seventy-seven".