1646613716 has 12 divisors (see below), whose sum is σ = 3143535360. Its totient is φ = 748460760.

The previous prime is 1646613697. The next prime is 1646613721. The reversal of 1646613716 is 6173166461.

It is a super-2 number, since 2×1646613716² = 5422673459438657312, which contains 22 as substring.

It is a congruent number.

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, 18711476 + ... + 18711563.

It is an arithmetic number, because the mean of its divisors is an integer number (261961280).

Almost surely, 2^1646613716 is an apocalyptic number.

It is an amenable number.

1646613716 is a deficient number, since it is larger than the sum of its proper divisors (1496921644).

1646613716 is a wasteful number, since it uses less digits than its factorization.

1646613716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37423054 (or 37423052 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 1646613716 is about 40578.4883404988. The cubic root of 1646613716 is about 1180.8568219147.

The spelling of 1646613716 in words is "one billion, six hundred forty-six million, six hundred thirteen thousand, seven hundred sixteen".