813404414181 has 4 divisors (see below), whose sum is σ = 1084539218912. Its totient is φ = 542269609452.

The previous prime is 813404414161. The next prime is 813404414183. The reversal of 813404414181 is 181414404318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 813404414181 - 2²¹ = 813402317029 is a prime.

It is a super-2 number, since 2×813404414181² (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 (813404414183) 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, 135567402361 + ... + 135567402366.

It is an arithmetic number, because the mean of its divisors is an integer number (271134804728).

Almost surely, 2^813404414181 is an apocalyptic number.

It is an amenable number.

813404414181 is a deficient number, since it is larger than the sum of its proper divisors (271134804731).

813404414181 is a wasteful number, since it uses less digits than its factorization.

813404414181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271134804730.

The product of its (nonzero) digits is 49152, while the sum is 39.

Adding to 813404414181 its reverse (181414404318), we get a palindrome (994818818499).

The spelling of 813404414181 in words is "eight hundred thirteen billion, four hundred four million, four hundred fourteen thousand, one hundred eighty-one".