616063237221 has 4 divisors (see below), whose sum is σ = 821417649632. Its totient is φ = 410708824812.

The previous prime is 616063237219. The next prime is 616063237253. The reversal of 616063237221 is 122732360616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 616063237221 - 2¹ = 616063237219 is a prime.

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 616063237221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616063237211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102677206201 + ... + 102677206206.

It is an arithmetic number, because the mean of its divisors is an integer number (205354412408).

Almost surely, 2^616063237221 is an apocalyptic number.

It is an amenable number.

616063237221 is a deficient number, since it is larger than the sum of its proper divisors (205354412411).

616063237221 is a wasteful number, since it uses less digits than its factorization.

616063237221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205354412410.

The product of its (nonzero) digits is 108864, while the sum is 39.

Adding to 616063237221 its reverse (122732360616), we get a palindrome (738795597837).

The spelling of 616063237221 in words is "six hundred sixteen billion, sixty-three million, two hundred thirty-seven thousand, two hundred twenty-one".