1606644609287 has 2 divisors, whose sum is σ = 1606644609288. Its totient is φ = 1606644609286.

The previous prime is 1606644609263. The next prime is 1606644609319. The reversal of 1606644609287 is 7829064466061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1606644609287 - 2³⁴ = 1589464740103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606644609257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803322304643 + 803322304644.

It is an arithmetic number, because the mean of its divisors is an integer number (803322304644).

Almost surely, 2^{1606644609287} is an apocalyptic number.

1606644609287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606644609287 is an equidigital number, since it uses as much as digits as its factorization.

1606644609287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 59.

The spelling of 1606644609287 in words is "one trillion, six hundred six billion, six hundred forty-four million, six hundred nine thousand, two hundred eighty-seven".