265766342650553 has 4 divisors (see below), whose sum is σ = 277321401026688. Its totient is φ = 254211284274420.

The previous prime is 265766342650513. The next prime is 265766342650631. The reversal of 265766342650553 is 355056243667562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 265766342650553 - 2¹⁰ = 265766342649529 is a prime.

It is a super-2 number, since 2×265766342650553² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 265766342650553.

It is not an unprimeable number, because it can be changed into a prime (265766342650513) 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, 5777529188033 + ... + 5777529188078.

It is an arithmetic number, because the mean of its divisors is an integer number (69330350256672).

Almost surely, 2^{265766342650553} is an apocalyptic number.

265766342650553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

265766342650553 is a deficient number, since it is larger than the sum of its proper divisors (11555058376135).

265766342650553 is a wasteful number, since it uses less digits than its factorization.

265766342650553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11555058376134.

The product of its (nonzero) digits is 816480000, while the sum is 65.

The spelling of 265766342650553 in words is "two hundred sixty-five trillion, seven hundred sixty-six billion, three hundred forty-two million, six hundred fifty thousand, five hundred fifty-three".