1646716464 has 60 divisors (see below), whose sum is σ = 4808899056. Its totient is φ = 525038976.

The previous prime is 1646716451. The next prime is 1646716469. The reversal of 1646716464 is 4646176461.

It is a super-2 number, since 2×1646716464² = 5423350225617326592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1646716469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245287 + ... + 251910.

Almost surely, 2^1646716464 is an apocalyptic number.

It is an amenable number.

1646716464 is an abundant number, since it is smaller than the sum of its proper divisors (3162182592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1646716464 is a wasteful number, since it uses less digits than its factorization.

1646716464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497234 (or 497225 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 1646716464 is about 40579.7543610111. The cubic root of 1646716464 is about 1180.8813830594.

The spelling of 1646716464 in words is "one billion, six hundred forty-six million, seven hundred sixteen thousand, four hundred sixty-four".