860994782258 has 54 divisors (see below), whose sum is σ = 1434586266711. Its totient is φ = 387375019200.

The previous prime is 860994782257. The next prime is 860994782309. The reversal of 860994782258 is 852287499068.

It can be written as a sum of positive squares in 5 ways, for example, as 24441257569 + 836553524689 = 156337^2 + 914633^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=656123.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (860994782257) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 699426503 + ... + 699427733.

Almost surely, 2^860994782258 is an apocalyptic number.

860994782258 is a deficient number, since it is larger than the sum of its proper divisors (573591484453).

860994782258 is an equidigital number, since it uses as much as digits as its factorization.

860994782258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 68.

The spelling of 860994782258 in words is "eight hundred sixty billion, nine hundred ninety-four million, seven hundred eighty-two thousand, two hundred fifty-eight".