616621524313 has 2 divisors, whose sum is σ = 616621524314. Its totient is φ = 616621524312.

The previous prime is 616621524287. The next prime is 616621524317. The reversal of 616621524313 is 313425126616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513110044489 + 103511479824 = 716317^2 + 321732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616621524313 is a prime.

It is not a weakly prime, because it can be changed into another prime (616621524317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308310762156 + 308310762157.

It is an arithmetic number, because the mean of its divisors is an integer number (308310762157).

Almost surely, 2^616621524313 is an apocalyptic number.

It is an amenable number.

616621524313 is a deficient number, since it is larger than the sum of its proper divisors (1).

616621524313 is an equidigital number, since it uses as much as digits as its factorization.

616621524313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The spelling of 616621524313 in words is "six hundred sixteen billion, six hundred twenty-one million, five hundred twenty-four thousand, three hundred thirteen".