8213873478492 has 96 divisors (see below), whose sum is σ = 21225366489600. Its totient is φ = 2451351347200.

The previous prime is 8213873478487. The next prime is 8213873478511. The reversal of 8213873478492 is 2948743783128.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8234884 + ... + 9178292.

It is an arithmetic number, because the mean of its divisors is an integer number (221097567600).

Almost surely, 2^{8213873478492} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8213873478492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10612683244800).

8213873478492 is an abundant number, since it is smaller than the sum of its proper divisors (13011493011108).

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

8213873478492 is a wasteful number, since it uses less digits than its factorization.

8213873478492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944427 (or 944425 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 66.

It can be divided in two parts, 8213873 and 478492, that added together give a triangular number (8692365 = T₄₁₆₉).

The spelling of 8213873478492 in words is "eight trillion, two hundred thirteen billion, eight hundred seventy-three million, four hundred seventy-eight thousand, four hundred ninety-two".