1646896964 has 12 divisors (see below), whose sum is σ = 3051603324. Its totient is φ = 775010304.

The previous prime is 1646896957. The next prime is 1646896997. The reversal of 1646896964 is 4696986461.

It can be written as a sum of positive squares in 2 ways, for example, as 1354828864 + 292068100 = 36808^2 + 17090^2 .

It is a super-2 number, since 2×1646896964² = 5424539220064834592, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12109469 + ... + 12109604.

It is an arithmetic number, because the mean of its divisors is an integer number (254300277).

Almost surely, 2^1646896964 is an apocalyptic number.

It is an amenable number.

1646896964 is a deficient number, since it is larger than the sum of its proper divisors (1404706360).

1646896964 is a wasteful number, since it uses less digits than its factorization.

1646896964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24219094 (or 24219092 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 59.

The square root of 1646896964 is about 40581.9783155035. The cubic root of 1646896964 is about 1180.9245277672.

The spelling of 1646896964 in words is "one billion, six hundred forty-six million, eight hundred ninety-six thousand, nine hundred sixty-four".