8215767411856 has 135 divisors (see below), whose sum is σ = 16605962421867. Its totient is φ = 3937630268160.

The previous prime is 8215767411853. The next prime is 8215767411899. The reversal of 8215767411856 is 6581147675128.

The square root of 8215767411856 is 2866316.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 409420819600 + 7806346592256 = 639860^2 + 2793984^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8215767411794 and 8215767411803.

It is not an unprimeable number, because it can be changed into a prime (8215767411853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 45390980086 + ... + 45390980266.

Almost surely, 2^{8215767411856} is an apocalyptic number.

8215767411856 is the 2866316-th square number.

It is an amenable number.

8215767411856 is an abundant number, since it is smaller than the sum of its proper divisors (8390195010011).

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

8215767411856 is an equidigital number, since it uses as much as digits as its factorization.

8215767411856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 327 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 61.

The spelling of 8215767411856 in words is "eight trillion, two hundred fifteen billion, seven hundred sixty-seven million, four hundred eleven thousand, eight hundred fifty-six".