8212840396957 has 16 divisors (see below), whose sum is σ = 9994076294400. Its totient is φ = 6733508890416.

The previous prime is 8212840396909. The next prime is 8212840396991. The reversal of 8212840396957 is 7596930482128.

It is not a de Polignac number, because 8212840396957 - 2³⁵ = 8178480658589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8212840396907) 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, 520516918 + ... + 520532695.

It is an arithmetic number, because the mean of its divisors is an integer number (624629768400).

It is a 3-persistent number, because k⋅8212840396957 is pandigital for 1 ≤ k ≤ 3, but not for k = 4.

Almost surely, 2^{8212840396957} is an apocalyptic number.

It is an amenable number.

8212840396957 is a deficient number, since it is larger than the sum of its proper divisors (1781235897443).

8212840396957 is a wasteful number, since it uses less digits than its factorization.

8212840396957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041049657 (or 1041049643 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 8212840396957 in words is "eight trillion, two hundred twelve billion, eight hundred forty million, three hundred ninety-six thousand, nine hundred fifty-seven".