813554455319 has 4 divisors (see below), whose sum is σ = 813557346696. Its totient is φ = 813551563944.

The previous prime is 813554455283. The next prime is 813554455321. The reversal of 813554455319 is 913554455318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 813554455319 - 2¹² = 813554451223 is a prime.

It is a super-2 number, since 2×813554455319² (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 (813554455349) 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, 971864 + ... + 1603629.

It is an arithmetic number, because the mean of its divisors is an integer number (203389336674).

Almost surely, 2^813554455319 is an apocalyptic number.

813554455319 is a deficient number, since it is larger than the sum of its proper divisors (2891377).

813554455319 is a wasteful number, since it uses less digits than its factorization.

813554455319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891376.

The product of its digits is 6480000, while the sum is 53.

Subtracting 813554455319 from its reverse (913554455318), we obtain a palindrome (99999999999).

The spelling of 813554455319 in words is "eight hundred thirteen billion, five hundred fifty-four million, four hundred fifty-five thousand, three hundred nineteen".