1659278001547 has 2 divisors, whose sum is σ = 1659278001548. Its totient is φ = 1659278001546.

The previous prime is 1659278001439. The next prime is 1659278001631. The reversal of 1659278001547 is 7451008729561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1659278001547 - 2³⁹ = 1109522187659 is a prime.

It is a super-2 number, since 2×1659278001547² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1659278007547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829639000773 + 829639000774.

It is an arithmetic number, because the mean of its divisors is an integer number (829639000774).

Almost surely, 2^{1659278001547} is an apocalyptic number.

1659278001547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659278001547 is an equidigital number, since it uses as much as digits as its factorization.

1659278001547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 1659278001547 in words is "one trillion, six hundred fifty-nine billion, two hundred seventy-eight million, one thousand, five hundred forty-seven".