8212840396956 has 72 divisors (see below), whose sum is σ = 22663439424080. Its totient is φ = 2492410984704.

The previous prime is 8212840396909. The next prime is 8212840396991. The reversal of 8212840396956 is 6596930482128.

8212840396956 is a `hidden beast` number, since 8 + 212 + 8 + 403 + 9 + 6 + 9 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 8212840396893 and 8212840396902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120163126 + ... + 120231453.

Almost surely, 2^{8212840396956} is an apocalyptic number.

It is an amenable number.

8212840396956 is an abundant number, since it is smaller than the sum of its proper divisors (14450599027124).

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

8212840396956 is a wasteful number, since it uses less digits than its factorization.

8212840396956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240394675 (or 240394670 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 8212840396956 in words is "eight trillion, two hundred twelve billion, eight hundred forty million, three hundred ninety-six thousand, nine hundred fifty-six".