265716399 has 16 divisors (see below), whose sum is σ = 381944192. Its totient is φ = 163345248.

The previous prime is 265716391. The next prime is 265716403. The reversal of 265716399 is 993617562.

It is not a de Polignac number, because 265716399 - 2³ = 265716391 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265716391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40764 + ... + 46830.

It is an arithmetic number, because the mean of its divisors is an integer number (23871512).

Almost surely, 2^265716399 is an apocalyptic number.

265716399 is a deficient number, since it is larger than the sum of its proper divisors (116227793).

265716399 is a wasteful number, since it uses less digits than its factorization.

265716399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7206.

The product of its digits is 612360, while the sum is 48.

The square root of 265716399 is about 16300.8097651620. The cubic root of 265716399 is about 642.8941186421.

The spelling of 265716399 in words is "two hundred sixty-five million, seven hundred sixteen thousand, three hundred ninety-nine".