641216619 has 6 divisors (see below), whose sum is σ = 926201796. Its totient is φ = 427477740.

The previous prime is 641216603. The next prime is 641216621. The reversal of 641216619 is 916612146.

641216619 is a `hidden beast` number, since 641 + 2 + 1 + 6 + 6 + 1 + 9 = 666.

It is not a de Polignac number, because 641216619 - 2⁴ = 641216603 is a prime.

It is a super-2 number, since 2×641216619² = 822317504963582322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641216669) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 35623137 + ... + 35623154.

It is an arithmetic number, because the mean of its divisors is an integer number (154366966).

Almost surely, 2^641216619 is an apocalyptic number.

641216619 is a deficient number, since it is larger than the sum of its proper divisors (284985177).

641216619 is a wasteful number, since it uses less digits than its factorization.

641216619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71246297 (or 71246294 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 641216619 is about 25322.2554090271. The cubic root of 641216619 is about 862.3195983124.

The spelling of 641216619 in words is "six hundred forty-one million, two hundred sixteen thousand, six hundred nineteen".