1056328656857 has 8 divisors (see below), whose sum is σ = 1068533610120. Its totient is φ = 1044131172480.

The previous prime is 1056328656811. The next prime is 1056328656899. The reversal of 1056328656857 is 7586568236501.

It can be written as a sum of positive squares in 4 ways, for example, as 37593719881 + 1018734936976 = 193891^2 + 1009324^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1056328656857 - 2⁶ = 1056328656793 is a prime.

It is a super-2 number, since 2×1056328656857² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1056328656857.

It is not an unprimeable number, because it can be changed into a prime (1056328656457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1582478 + ... + 2148695.

It is an arithmetic number, because the mean of its divisors is an integer number (133566701265).

Almost surely, 2^{1056328656857} is an apocalyptic number.

It is an amenable number.

1056328656857 is a deficient number, since it is larger than the sum of its proper divisors (12204953263).

1056328656857 is an equidigital number, since it uses as much as digits as its factorization.

1056328656857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734443.

The product of its (nonzero) digits is 72576000, while the sum is 62.

The spelling of 1056328656857 in words is "one trillion, fifty-six billion, three hundred twenty-eight million, six hundred fifty-six thousand, eight hundred fifty-seven".