811255266653 has 4 divisors (see below), whose sum is σ = 873659517948. Its totient is φ = 748851015360.

The previous prime is 811255266641. The next prime is 811255266667. The reversal of 811255266653 is 356662552118.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178660918489 + 632594348164 = 422683^2 + 795358^2 .

It is a cyclic number.

It is not a de Polignac number, because 811255266653 - 2²⁴ = 811238489437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811255266673) 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, 31202125628 + ... + 31202125653.

It is an arithmetic number, because the mean of its divisors is an integer number (218414879487).

Almost surely, 2^811255266653 is an apocalyptic number.

It is an amenable number.

811255266653 is a deficient number, since it is larger than the sum of its proper divisors (62404251295).

811255266653 is a wasteful number, since it uses less digits than its factorization.

811255266653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62404251294.

The product of its digits is 2592000, while the sum is 50.

The spelling of 811255266653 in words is "eight hundred eleven billion, two hundred fifty-five million, two hundred sixty-six thousand, six hundred fifty-three".