265489776049 has 9 divisors (see below), whose sum is σ = 267512930881. Its totient is φ = 263481819520.

The previous prime is 265489776029. The next prime is 265489776107. The reversal of 265489776049 is 940677984562.

The square root of 265489776049 is 515257.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 297735025 + 265192041024 = 17255^2 + 514968^2 .

It is not a de Polignac number, because 265489776049 - 2¹¹ = 265489774001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265489776029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 70588329 + ... + 70592089.

Almost surely, 2^265489776049 is an apocalyptic number.

265489776049 is the 515257-th square number.

265489776049 is the 257629-th centered octagonal number.

It is an amenable number.

265489776049 is a deficient number, since it is larger than the sum of its proper divisors (2023154832).

265489776049 is an frugal number, since it uses more digits than its factorization.

265489776049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7796 (or 3898 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 67.

The spelling of 265489776049 in words is "two hundred sixty-five billion, four hundred eighty-nine million, seven hundred seventy-six thousand, forty-nine".