1646605056 has 72 divisors (see below), whose sum is σ = 4613062720. Its totient is φ = 519975936.

The previous prime is 1646605049. The next prime is 1646605073. The reversal of 1646605056 is 6505066461.

1646605056 is nontrivially palindromic in base 7.

It is a super-2 number, since 2×1646605056² = 5422616420889526272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41830 + ... + 71013.

Almost surely, 2^1646605056 is an apocalyptic number.

1646605056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1646605056 is an abundant number, since it is smaller than the sum of its proper divisors (2966457664).

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

1646605056 is a wasteful number, since it uses less digits than its factorization.

1646605056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112881 (or 112867 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 1646605056 is about 40578.3816335743. The cubic root of 1646605056 is about 1180.8547517594.

The spelling of 1646605056 in words is "one billion, six hundred forty-six million, six hundred five thousand, fifty-six".