538239779813 has 2 divisors, whose sum is σ = 538239779814. Its totient is φ = 538239779812.

The previous prime is 538239779807. The next prime is 538239779839. The reversal of 538239779813 is 318977932835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365182115809 + 173057664004 = 604303^2 + 416002^2 .

It is a cyclic number.

It is not a de Polignac number, because 538239779813 - 2¹⁶ = 538239714277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 538239779813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538239779863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269119889906 + 269119889907.

It is an arithmetic number, because the mean of its divisors is an integer number (269119889907).

Almost surely, 2^538239779813 is an apocalyptic number.

It is an amenable number.

538239779813 is a deficient number, since it is larger than the sum of its proper divisors (1).

538239779813 is an equidigital number, since it uses as much as digits as its factorization.

538239779813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68584320, while the sum is 65.

The spelling of 538239779813 in words is "five hundred thirty-eight billion, two hundred thirty-nine million, seven hundred seventy-nine thousand, eight hundred thirteen".