813801218253 has 16 divisors (see below), whose sum is σ = 1087663051776. Its totient is φ = 541236971520.

The previous prime is 813801218221. The next prime is 813801218299. The reversal of 813801218253 is 352812108318.

It is not a de Polignac number, because 813801218253 - 2⁵ = 813801218221 is a prime.

It is a super-4 number, since 4×813801218253⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813801218053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26337373 + ... + 26368253.

It is an arithmetic number, because the mean of its divisors is an integer number (67978940736).

Almost surely, 2^813801218253 is an apocalyptic number.

It is an amenable number.

813801218253 is a deficient number, since it is larger than the sum of its proper divisors (273861833523).

813801218253 is a wasteful number, since it uses less digits than its factorization.

813801218253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51604.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 813801218253 in words is "eight hundred thirteen billion, eight hundred one million, two hundred eighteen thousand, two hundred fifty-three".