616601884061 has 2 divisors, whose sum is σ = 616601884062. Its totient is φ = 616601884060.

The previous prime is 616601884021. The next prime is 616601884123. The reversal of 616601884061 is 160488106616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533931258436 + 82670625625 = 730706^2 + 287525^2 .

It is a cyclic number.

It is not a de Polignac number, because 616601884061 - 2³⁸ = 341723977117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 616601883997 and 616601884015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616601884021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308300942030 + 308300942031.

It is an arithmetic number, because the mean of its divisors is an integer number (308300942031).

Almost surely, 2^616601884061 is an apocalyptic number.

It is an amenable number.

616601884061 is a deficient number, since it is larger than the sum of its proper divisors (1).

616601884061 is an equidigital number, since it uses as much as digits as its factorization.

616601884061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 616601884061 in words is "six hundred sixteen billion, six hundred one million, eight hundred eighty-four thousand, sixty-one".