1654450161409 has 2 divisors, whose sum is σ = 1654450161410. Its totient is φ = 1654450161408.

The previous prime is 1654450161347. The next prime is 1654450161421. The reversal of 1654450161409 is 9041610544561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1611122490000 + 43327671409 = 1269300^2 + 208153^2 .

It is a cyclic number.

It is not a de Polignac number, because 1654450161409 - 2³⁷ = 1517011207937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1654450161439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827225080704 + 827225080705.

It is an arithmetic number, because the mean of its divisors is an integer number (827225080705).

Almost surely, 2^{1654450161409} is an apocalyptic number.

It is an amenable number.

1654450161409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1654450161409 is an equidigital number, since it uses as much as digits as its factorization.

1654450161409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 1654450161409 in words is "one trillion, six hundred fifty-four billion, four hundred fifty million, one hundred sixty-one thousand, four hundred nine".