1646616013 has 8 divisors (see below), whose sum is σ = 1885158720. Its totient is φ = 1408901280.

The previous prime is 1646616011. The next prime is 1646616043. The reversal of 1646616013 is 3106166461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1646616013 - 2¹ = 1646616011 is a prime.

It is a super-2 number, since 2×1646616013² = 5422688588536032338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1646616013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646616011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202723 + ... + 210688.

It is an arithmetic number, because the mean of its divisors is an integer number (235644840).

Almost surely, 2^1646616013 is an apocalyptic number.

It is an amenable number.

1646616013 is a deficient number, since it is larger than the sum of its proper divisors (238542707).

1646616013 is an equidigital number, since it uses as much as digits as its factorization.

1646616013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413987.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1646616013 is about 40578.5166436626. The cubic root of 1646616013 is about 1180.8573710066.

The spelling of 1646616013 in words is "one billion, six hundred forty-six million, six hundred sixteen thousand, thirteen".