617613661487 has 2 divisors, whose sum is σ = 617613661488. Its totient is φ = 617613661486.

The previous prime is 617613661451. The next prime is 617613661537. The reversal of 617613661487 is 784166316716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 617613661487 - 2¹² = 617613657391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617613667487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308806830743 + 308806830744.

It is an arithmetic number, because the mean of its divisors is an integer number (308806830744).

Almost surely, 2^617613661487 is an apocalyptic number.

617613661487 is a deficient number, since it is larger than the sum of its proper divisors (1).

617613661487 is an equidigital number, since it uses as much as digits as its factorization.

617613661487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 56.

The spelling of 617613661487 in words is "six hundred seventeen billion, six hundred thirteen million, six hundred sixty-one thousand, four hundred eighty-seven".