1646329396 has 12 divisors (see below), whose sum is σ = 2910778948. Its totient is φ = 814678272.

The previous prime is 1646329379. The next prime is 1646329417. The reversal of 1646329396 is 6939236461.

It can be written as a sum of positive squares in 2 ways, for example, as 713637796 + 932691600 = 26714^2 + 30540^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2121171 + ... + 2121946.

Almost surely, 2^1646329396 is an apocalyptic number.

It is an amenable number.

1646329396 is a deficient number, since it is larger than the sum of its proper divisors (1264449552).

1646329396 is a wasteful number, since it uses less digits than its factorization.

1646329396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243218 (or 4243216 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 49.

The square root of 1646329396 is about 40574.9848552036. The cubic root of 1646329396 is about 1180.7888520089.

The spelling of 1646329396 in words is "one billion, six hundred forty-six million, three hundred twenty-nine thousand, three hundred ninety-six".