1582661312563 has 2 divisors, whose sum is σ = 1582661312564. Its totient is φ = 1582661312562.

The previous prime is 1582661312549. The next prime is 1582661312567. The reversal of 1582661312563 is 3652131662851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1582661312563 - 2⁹ = 1582661312051 is a prime.

It is not a weakly prime, because it can be changed into another prime (1582661312567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791330656281 + 791330656282.

It is an arithmetic number, because the mean of its divisors is an integer number (791330656282).

Almost surely, 2^{1582661312563} is an apocalyptic number.

1582661312563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1582661312563 is an equidigital number, since it uses as much as digits as its factorization.

1582661312563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 49.

The spelling of 1582661312563 in words is "one trillion, five hundred eighty-two billion, six hundred sixty-one million, three hundred twelve thousand, five hundred sixty-three".