814273128409 has 4 divisors (see below), whose sum is σ = 876909522916. Its totient is φ = 751636733904.

The previous prime is 814273128391. The next prime is 814273128419. The reversal of 814273128409 is 904821372418.

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 39746403225 + 774526725184 = 199365^2 + 880072^2 .

It is a cyclic number.

It is not a de Polignac number, because 814273128409 - 2²³ = 814264739801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (814273128419) 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, 31318197234 + ... + 31318197259.

It is an arithmetic number, because the mean of its divisors is an integer number (219227380729).

Almost surely, 2^814273128409 is an apocalyptic number.

It is an amenable number.

814273128409 is a deficient number, since it is larger than the sum of its proper divisors (62636394507).

814273128409 is a wasteful number, since it uses less digits than its factorization.

814273128409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62636394506.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 814273128409 in words is "eight hundred fourteen billion, two hundred seventy-three million, one hundred twenty-eight thousand, four hundred nine".