813495521144 has 16 divisors (see below), whose sum is σ = 1536437710800. Its totient is φ = 403778798272.

The previous prime is 813495521123. The next prime is 813495521161. The reversal of 813495521144 is 441125594318.

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, 371119124 + ... + 371121315.

It is an arithmetic number, because the mean of its divisors is an integer number (96027356925).

Almost surely, 2^813495521144 is an apocalyptic number.

It is an amenable number.

813495521144 is a deficient number, since it is larger than the sum of its proper divisors (722942189656).

813495521144 is a wasteful number, since it uses less digits than its factorization.

813495521144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742240582 (or 742240578 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The spelling of 813495521144 in words is "eight hundred thirteen billion, four hundred ninety-five million, five hundred twenty-one thousand, one hundred forty-four".