813554455318 has 8 divisors (see below), whose sum is σ = 1331270926920. Its totient is φ = 369797479680.

The previous prime is 813554455283. The next prime is 813554455321.

It is a happy number.

813554455318 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×813554455318² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18489873963 + ... + 18489874006.

It is an arithmetic number, because the mean of its divisors is an integer number (166408865865).

Almost surely, 2^813554455318 is an apocalyptic number.

813554455318 is a deficient number, since it is larger than the sum of its proper divisors (517716471602).

813554455318 is a wasteful number, since it uses less digits than its factorization.

813554455318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36979747982.

The product of its digits is 5760000, while the sum is 52.

The spelling of 813554455318 in words is "eight hundred thirteen billion, five hundred fifty-four million, four hundred fifty-five thousand, three hundred eighteen".