6404656123 has 2 divisors, whose sum is σ = 6404656124. Its totient is φ = 6404656122.

The previous prime is 6404656099. The next prime is 6404656129. The reversal of 6404656123 is 3216564046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6404656123 - 2¹⁷ = 6404525051 is a prime.

It is a super-2 number, since 2×6404656123² = 82039240107762782258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6404656129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202328061 + 3202328062.

It is an arithmetic number, because the mean of its divisors is an integer number (3202328062).

Almost surely, 2^6404656123 is an apocalyptic number.

6404656123 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404656123 is an equidigital number, since it uses as much as digits as its factorization.

6404656123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 6404656123 is about 80029.0954778323. The cubic root of 6404656123 is about 1857.0856703126.

The spelling of 6404656123 in words is "six billion, four hundred four million, six hundred fifty-six thousand, one hundred twenty-three".