265139834813 has 12 divisors (see below), whose sum is σ = 309628094652. Its totient is φ = 226378414080.

The previous prime is 265139834783. The next prime is 265139834833. The reversal of 265139834813 is 318438931562.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136919980729 + 128219854084 = 370027^2 + 358078^2 .

It is not a de Polignac number, because 265139834813 - 2²² = 265135640509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265139834833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10514678 + ... + 10539863.

It is an arithmetic number, because the mean of its divisors is an integer number (25802341221).

Almost surely, 2^265139834813 is an apocalyptic number.

It is an amenable number.

265139834813 is a deficient number, since it is larger than the sum of its proper divisors (44488259839).

265139834813 is a wasteful number, since it uses less digits than its factorization.

265139834813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21054812 (or 21054805 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The spelling of 265139834813 in words is "two hundred sixty-five billion, one hundred thirty-nine million, eight hundred thirty-four thousand, eight hundred thirteen".