538209442061 has 2 divisors, whose sum is σ = 538209442062. Its totient is φ = 538209442060.

The previous prime is 538209442051. The next prime is 538209442109. The reversal of 538209442061 is 160244902835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430375360900 + 107834081161 = 656030^2 + 328381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538209442061 is a prime.

It is a super-2 number, since 2×538209442061² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538209442021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269104721030 + 269104721031.

It is an arithmetic number, because the mean of its divisors is an integer number (269104721031).

Almost surely, 2^538209442061 is an apocalyptic number.

It is an amenable number.

538209442061 is a deficient number, since it is larger than the sum of its proper divisors (1).

538209442061 is an equidigital number, since it uses as much as digits as its factorization.

538209442061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 538209442061 in words is "five hundred thirty-eight billion, two hundred nine million, four hundred forty-two thousand, sixty-one".