1659278323993 has 2 divisors, whose sum is σ = 1659278323994. Its totient is φ = 1659278323992.

The previous prime is 1659278323933. The next prime is 1659278324009. The reversal of 1659278323993 is 3993238729561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1377775921369 + 281502402624 = 1173787^2 + 530568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1659278323993 - 2²⁹ = 1658741453081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1659278323933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829639161996 + 829639161997.

It is an arithmetic number, because the mean of its divisors is an integer number (829639161997).

Almost surely, 2^{1659278323993} is an apocalyptic number.

It is an amenable number.

1659278323993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659278323993 is an equidigital number, since it uses as much as digits as its factorization.

1659278323993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132269760, while the sum is 67.

The spelling of 1659278323993 in words is "one trillion, six hundred fifty-nine billion, two hundred seventy-eight million, three hundred twenty-three thousand, nine hundred ninety-three".