814374319419181 has 4 divisors (see below), whose sum is σ = 814452406908700. Its totient is φ = 814296231929664.

The previous prime is 814374319419169. The next prime is 814374319419281. The reversal of 814374319419181 is 181914913473418.

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 671774085146025 + 142600234273156 = 25918605^2 + 11941534^2 .

It is a cyclic number.

It is not a de Polignac number, because 814374319419181 - 2⁵ = 814374319419149 is a prime.

It is a super-2 number, since 2×814374319419181² (a number of 31 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 (814374319419281) 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, 39043729116 + ... + 39043749973.

It is an arithmetic number, because the mean of its divisors is an integer number (203613101727175).

Almost surely, 2^{814374319419181} is an apocalyptic number.

It is an amenable number.

814374319419181 is a deficient number, since it is larger than the sum of its proper divisors (78087489519).

814374319419181 is a wasteful number, since it uses less digits than its factorization.

814374319419181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78087489518.

The product of its digits is 20901888, while the sum is 64.

The spelling of 814374319419181 in words is "eight hundred fourteen trillion, three hundred seventy-four billion, three hundred nineteen million, four hundred nineteen thousand, one hundred eighty-one".