616661049187 has 2 divisors, whose sum is σ = 616661049188. Its totient is φ = 616661049186.

The previous prime is 616661049163. The next prime is 616661049197. The reversal of 616661049187 is 781940166616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616661049187 - 2³¹ = 614513565539 is a prime.

It is not a weakly prime, because it can be changed into another prime (616661049127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308330524593 + 308330524594.

It is an arithmetic number, because the mean of its divisors is an integer number (308330524594).

Almost surely, 2^616661049187 is an apocalyptic number.

616661049187 is a deficient number, since it is larger than the sum of its proper divisors (1).

616661049187 is an equidigital number, since it uses as much as digits as its factorization.

616661049187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 616661049187 in words is "six hundred sixteen billion, six hundred sixty-one million, forty-nine thousand, one hundred eighty-seven".