810266811157 has 4 divisors (see below), whose sum is σ = 810287101260. Its totient is φ = 810246521056.

The previous prime is 810266811119. The next prime is 810266811161. The reversal of 810266811157 is 751118662018.

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 365379145156 + 444887666001 = 604466^2 + 666999^2 .

It is a cyclic number.

It is not a de Polignac number, because 810266811157 - 2²³ = 810258422549 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 (810266811257) 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, 10085032 + ... + 10165057.

It is an arithmetic number, because the mean of its divisors is an integer number (202571775315).

Almost surely, 2^810266811157 is an apocalyptic number.

It is an amenable number.

810266811157 is a deficient number, since it is larger than the sum of its proper divisors (20290103).

810266811157 is a wasteful number, since it uses less digits than its factorization.

810266811157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20290102.

The product of its (nonzero) digits is 161280, while the sum is 46.

The spelling of 810266811157 in words is "eight hundred ten billion, two hundred sixty-six million, eight hundred eleven thousand, one hundred fifty-seven".