1057864817866 has 4 divisors (see below), whose sum is σ = 1586797226802. Its totient is φ = 528932408932.

The previous prime is 1057864817839. The next prime is 1057864817887. The reversal of 1057864817866 is 6687184687501.

1057864817866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 884624897025 + 173239920841 = 940545^2 + 416221^2 .

It is a super-2 number, since 2×1057864817866² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264466204465 + ... + 264466204468.

Almost surely, 2^{1057864817866} is an apocalyptic number.

1057864817866 is a deficient number, since it is larger than the sum of its proper divisors (528932408936).

1057864817866 is an equidigital number, since it uses as much as digits as its factorization.

1057864817866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528932408935.

The product of its (nonzero) digits is 108380160, while the sum is 67.

The spelling of 1057864817866 in words is "one trillion, fifty-seven billion, eight hundred sixty-four million, eight hundred seventeen thousand, eight hundred sixty-six".