1654450166389 has 2 divisors, whose sum is σ = 1654450166390. Its totient is φ = 1654450166388.

The previous prime is 1654450166381. The next prime is 1654450166407. The reversal of 1654450166389 is 9836610544561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1533530536164 + 120919630225 = 1238358^2 + 347735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1654450166389 - 2³ = 1654450166381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1654450166381) 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, 827225083194 + 827225083195.

It is an arithmetic number, because the mean of its divisors is an integer number (827225083195).

Almost surely, 2^{1654450166389} is an apocalyptic number.

It is an amenable number.

1654450166389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1654450166389 is an equidigital number, since it uses as much as digits as its factorization.

1654450166389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18662400, while the sum is 58.

The spelling of 1654450166389 in words is "one trillion, six hundred fifty-four billion, four hundred fifty million, one hundred sixty-six thousand, three hundred eighty-nine".