616381481 has 2 divisors, whose sum is σ = 616381482. Its totient is φ = 616381480.

The previous prime is 616381477. The next prime is 616381517. The reversal of 616381481 is 184183616.

616381481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344659225 + 271722256 = 18565^2 + 16484^2 .

It is a cyclic number.

It is not a de Polignac number, because 616381481 - 2² = 616381477 is a prime.

It is a super-2 number, since 2×616381481² = 759852260239506722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (616381421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308190740 + 308190741.

It is an arithmetic number, because the mean of its divisors is an integer number (308190741).

Almost surely, 2^616381481 is an apocalyptic number.

It is an amenable number.

616381481 is a deficient number, since it is larger than the sum of its proper divisors (1).

616381481 is an equidigital number, since it uses as much as digits as its factorization.

616381481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 616381481 is about 24827.0312562739. The cubic root of 616381481 is about 851.0397799138.

The spelling of 616381481 in words is "six hundred sixteen million, three hundred eighty-one thousand, four hundred eighty-one".