813801218252 has 12 divisors (see below), whose sum is σ = 1553620507656. Its totient is φ = 369909644640.

The previous prime is 813801218221. The next prime is 813801218299. The reversal of 813801218252 is 252812108318.

813801218252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 9247741073 + ... + 9247741160.

It is an arithmetic number, because the mean of its divisors is an integer number (129468375638).

Almost surely, 2^813801218252 is an apocalyptic number.

It is an amenable number.

813801218252 is a deficient number, since it is larger than the sum of its proper divisors (739819289404).

813801218252 is a wasteful number, since it uses less digits than its factorization.

813801218252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18495482248 (or 18495482246 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 41.

The spelling of 813801218252 in words is "eight hundred thirteen billion, eight hundred one million, two hundred eighteen thousand, two hundred fifty-two".