1866835500097 has 2 divisors, whose sum is σ = 1866835500098. Its totient is φ = 1866835500096.

The previous prime is 1866835500041. The next prime is 1866835500113. The reversal of 1866835500097 is 7900055386681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943091534641 + 923743965456 = 971129^2 + 961116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1866835500097 - 2³⁵ = 1832475761729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1866835500997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933417750048 + 933417750049.

It is an arithmetic number, because the mean of its divisors is an integer number (933417750049).

Almost surely, 2^{1866835500097} is an apocalyptic number.

It is an amenable number.

1866835500097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866835500097 is an equidigital number, since it uses as much as digits as its factorization.

1866835500097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 1866835500097 in words is "one trillion, eight hundred sixty-six billion, eight hundred thirty-five million, five hundred thousand, ninety-seven".