814020136469 has 4 divisors (see below), whose sum is σ = 814078257420. Its totient is φ = 813962015520.

The previous prime is 814020136459. The next prime is 814020136471. The reversal of 814020136469 is 964631020418.

814020136469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 621987750244 + 192032386225 = 788662^2 + 438215^2 .

It is a cyclic number.

It is not a de Polignac number, because 814020136469 - 2¹⁶ = 814020070933 is a prime.

It is a super-2 number, since 2×814020136469² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814020136459) 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, 29039462 + ... + 29067479.

It is an arithmetic number, because the mean of its divisors is an integer number (203519564355).

Almost surely, 2^814020136469 is an apocalyptic number.

It is an amenable number.

814020136469 is a deficient number, since it is larger than the sum of its proper divisors (58120951).

814020136469 is a wasteful number, since it uses less digits than its factorization.

814020136469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58120950.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 814020136469 in words is "eight hundred fourteen billion, twenty million, one hundred thirty-six thousand, four hundred sixty-nine".