265640520131111 has 4 divisors (see below), whose sum is σ = 271818206645832. Its totient is φ = 259462833616392.

The previous prime is 265640520131089. The next prime is 265640520131167. The reversal of 265640520131111 is 111131025046562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 265640520131111 - 2¹⁴ = 265640520114727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265640520133111) 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, 3088843257296 + ... + 3088843257381.

It is an arithmetic number, because the mean of its divisors is an integer number (67954551661458).

Almost surely, 2^{265640520131111} is an apocalyptic number.

265640520131111 is a deficient number, since it is larger than the sum of its proper divisors (6177686514721).

265640520131111 is an equidigital number, since it uses as much as digits as its factorization.

265640520131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6177686514720.

The product of its (nonzero) digits is 43200, while the sum is 38.

Adding to 265640520131111 its reverse (111131025046562), we get a palindrome (376771545177673).

The spelling of 265640520131111 in words is "two hundred sixty-five trillion, six hundred forty billion, five hundred twenty million, one hundred thirty-one thousand, one hundred eleven".