616255663 has 2 divisors, whose sum is σ = 616255664. Its totient is φ = 616255662.

The previous prime is 616255553. The next prime is 616255687. The reversal of 616255663 is 366552616.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616255663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616258663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308127831 + 308127832.

It is an arithmetic number, because the mean of its divisors is an integer number (308127832).

Almost surely, 2^616255663 is an apocalyptic number.

616255663 is a deficient number, since it is larger than the sum of its proper divisors (1).

616255663 is an equidigital number, since it uses as much as digits as its factorization.

616255663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 40.

The square root of 616255663 is about 24824.4972355937. The cubic root of 616255663 is about 850.9818702086.

The spelling of 616255663 in words is "six hundred sixteen million, two hundred fifty-five thousand, six hundred sixty-three".