1616941639 has 4 divisors (see below), whose sum is σ = 1619441424. Its totient is φ = 1614441856.

The previous prime is 1616941637. The next prime is 1616941681. The reversal of 1616941639 is 9361496161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1616941639 - 2¹ = 1616941637 is a prime.

It is a super-2 number, since 2×1616941639² = 5229000527864012642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616941631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1248922 + ... + 1250215.

It is an arithmetic number, because the mean of its divisors is an integer number (404860356).

Almost surely, 2^1616941639 is an apocalyptic number.

1616941639 is a deficient number, since it is larger than the sum of its proper divisors (2499785).

1616941639 is an equidigital number, since it uses as much as digits as its factorization.

1616941639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499784.

The product of its digits is 209952, while the sum is 46.

The square root of 1616941639 is about 40211.2128516413. The cubic root of 1616941639 is about 1173.7207478449.

The spelling of 1616941639 in words is "one billion, six hundred sixteen million, nine hundred forty-one thousand, six hundred thirty-nine".