265320023563 has 16 divisors (see below), whose sum is σ = 308251350016. Its totient is φ = 223647207840.

The previous prime is 265320023557. The next prime is 265320023597. The reversal of 265320023563 is 365320023562.

265320023563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 265320023563 - 2³⁷ = 127881070091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265320023503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2345770 + ... + 2456272.

It is an arithmetic number, because the mean of its divisors is an integer number (19265709376).

Almost surely, 2^265320023563 is an apocalyptic number.

265320023563 is a deficient number, since it is larger than the sum of its proper divisors (42931326453).

265320023563 is a wasteful number, since it uses less digits than its factorization.

265320023563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116194.

The product of its (nonzero) digits is 194400, while the sum is 37.

Subtracting 265320023563 from its reverse (365320023562), we obtain a palindrome (99999999999).

The spelling of 265320023563 in words is "two hundred sixty-five billion, three hundred twenty million, twenty-three thousand, five hundred sixty-three".