813210437868 has 24 divisors (see below), whose sum is σ = 1901774309568. Its totient is φ = 270458247696.

The previous prime is 813210437863. The next prime is 813210437881. The reversal of 813210437868 is 868734012318.

It is a super-3 number, since 3×813210437868³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 813210437868.

It is not an unprimeable number, because it can be changed into a prime (813210437863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76481746 + ... + 76492377.

It is an arithmetic number, because the mean of its divisors is an integer number (79240596232).

Almost surely, 2^813210437868 is an apocalyptic number.

It is an amenable number.

813210437868 is an abundant number, since it is smaller than the sum of its proper divisors (1088563871700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813210437868 is a wasteful number, since it uses less digits than its factorization.

813210437868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152974573 (or 152974571 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 813210437868 in words is "eight hundred thirteen billion, two hundred ten million, four hundred thirty-seven thousand, eight hundred sixty-eight".