813836000000 has 126 divisors (see below), whose sum is σ = 2030600179860. Its totient is φ = 325532800000.

The previous prime is 813835999969. The next prime is 813836000009. The reversal of 813836000000 is 638318.

It is not an unprimeable number, because it can be changed into a prime (813836000009) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3898271 + ... + 4101729.

Almost surely, 2^813836000000 is an apocalyptic number.

813836000000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813836000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015300089930).

813836000000 is an abundant number, since it is smaller than the sum of its proper divisors (1216764179860).

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

813836000000 is an frugal number, since it uses more digits than its factorization.

813836000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203505 (or 203466 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 813836000000 its reverse (638318), we get a palindrome (813836638318).

The spelling of 813836000000 in words is "eight hundred thirteen billion, eight hundred thirty-six million", and thus it is an aban number.