1859277916817 has 2 divisors, whose sum is σ = 1859277916818. Its totient is φ = 1859277916816.

The previous prime is 1859277916751. The next prime is 1859277916843. The reversal of 1859277916817 is 7186197729581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1195576043776 + 663701873041 = 1093424^2 + 814679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1859277916817 - 2²⁴ = 1859261139601 is a prime.

It is a super-2 number, since 2×1859277916817² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1859277916117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929638958408 + 929638958409.

It is an arithmetic number, because the mean of its divisors is an integer number (929638958409).

Almost surely, 2^{1859277916817} is an apocalyptic number.

It is an amenable number.

1859277916817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1859277916817 is an equidigital number, since it uses as much as digits as its factorization.

1859277916817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 106686720, while the sum is 71.

The spelling of 1859277916817 in words is "one trillion, eight hundred fifty-nine billion, two hundred seventy-seven million, nine hundred sixteen thousand, eight hundred seventeen".