616321256453611 has 4 divisors (see below), whose sum is σ = 632978587709152. Its totient is φ = 599663925198072.

The previous prime is 616321256453603. The next prime is 616321256453671. The reversal of 616321256453611 is 116354652123616.

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 616321256453611 - 2³ = 616321256453603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616321256453671) 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, 8328665627715 + ... + 8328665627788.

It is an arithmetic number, because the mean of its divisors is an integer number (158244646927288).

Almost surely, 2^{616321256453611} is an apocalyptic number.

616321256453611 is a deficient number, since it is larger than the sum of its proper divisors (16657331255541).

616321256453611 is a wasteful number, since it uses less digits than its factorization.

616321256453611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16657331255540.

The product of its digits is 4665600, while the sum is 52.

The spelling of 616321256453611 in words is "six hundred sixteen trillion, three hundred twenty-one billion, two hundred fifty-six million, four hundred fifty-three thousand, six hundred eleven".