814471778813 has 64 divisors (see below), whose sum is σ = 1099042560000. Its totient is φ = 596653948800.

The previous prime is 814471778807. The next prime is 814471778819. The reversal of 814471778813 is 318877174418.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (814471778807) and next prime (814471778819).

It is not a de Polignac number, because 814471778813 - 2²⁰ = 814470730237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814471778819) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9347633 + ... + 9434361.

It is an arithmetic number, because the mean of its divisors is an integer number (17172540000).

Almost surely, 2^814471778813 is an apocalyptic number.

It is an amenable number.

814471778813 is a deficient number, since it is larger than the sum of its proper divisors (284570781187).

814471778813 is a wasteful number, since it uses less digits than its factorization.

814471778813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86911 (or 86897 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 59.

The spelling of 814471778813 in words is "eight hundred fourteen billion, four hundred seventy-one million, seven hundred seventy-eight thousand, eight hundred thirteen".