6464842456 has 16 divisors (see below), whose sum is σ = 12125865240. Its totient is φ = 3231278400.

The previous prime is 6464842381. The next prime is 6464842457. The reversal of 6464842456 is 6542484646.

It is a super-2 number, since 2×6464842456² = 83588375961800223872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464842457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118570 + ... + 164281.

Almost surely, 2^6464842456 is an apocalyptic number.

It is an amenable number.

6464842456 is a deficient number, since it is larger than the sum of its proper divisors (5661022784).

6464842456 is a wasteful number, since it uses less digits than its factorization.

6464842456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285714 (or 285710 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 49.

The square root of 6464842456 is about 80404.2440173403. The cubic root of 6464842456 is about 1862.8847262893.

The spelling of 6464842456 in words is "six billion, four hundred sixty-four million, eight hundred forty-two thousand, four hundred fifty-six".