538740107281 has 4 divisors (see below), whose sum is σ = 547871295600. Its totient is φ = 529608918964.

The previous prime is 538740107267. The next prime is 538740107327. The reversal of 538740107281 is 182701047835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 182701047835 = 5 ⋅36540209567.

It is a cyclic number.

It is not a de Polignac number, because 538740107281 - 2⁵ = 538740107249 is a prime.

It is a super-2 number, since 2×538740107281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538740107881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4565594071 + ... + 4565594188.

It is an arithmetic number, because the mean of its divisors is an integer number (136967823900).

Almost surely, 2^538740107281 is an apocalyptic number.

It is an amenable number.

538740107281 is a deficient number, since it is larger than the sum of its proper divisors (9131188319).

538740107281 is an equidigital number, since it uses as much as digits as its factorization.

538740107281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9131188318.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 538740107281 in words is "five hundred thirty-eight billion, seven hundred forty million, one hundred seven thousand, two hundred eighty-one".