616124145649 has 2 divisors, whose sum is σ = 616124145650. Its totient is φ = 616124145648.

The previous prime is 616124145619. The next prime is 616124145661. The reversal of 616124145649 is 946541421616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 535740555249 + 80383590400 = 731943^2 + 283520^2 .

It is a cyclic number.

It is not a de Polignac number, because 616124145649 - 2²⁵ = 616090591217 is a prime.

It is not a weakly prime, because it can be changed into another prime (616124145619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308062072824 + 308062072825.

It is an arithmetic number, because the mean of its divisors is an integer number (308062072825).

Almost surely, 2^616124145649 is an apocalyptic number.

It is an amenable number.

616124145649 is a deficient number, since it is larger than the sum of its proper divisors (1).

616124145649 is an equidigital number, since it uses as much as digits as its factorization.

616124145649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 49.

The spelling of 616124145649 in words is "six hundred sixteen billion, one hundred twenty-four million, one hundred forty-five thousand, six hundred forty-nine".