1654450161389 has 4 divisors (see below), whose sum is σ = 1661315100060. Its totient is φ = 1647585222720.

The previous prime is 1654450161347. The next prime is 1654450161409. The reversal of 1654450161389 is 9831610544561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1446643645225 + 207806516164 = 1202765^2 + 455858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1654450161389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1654450161389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1654450166389) 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 in 3 ways as a sum of consecutive naturals, for example, 3432468974 + ... + 3432469455.

It is an arithmetic number, because the mean of its divisors is an integer number (415328775015).

Almost surely, 2^{1654450161389} is an apocalyptic number.

It is an amenable number.

1654450161389 is a deficient number, since it is larger than the sum of its proper divisors (6864938671).

1654450161389 is an equidigital number, since it uses as much as digits as its factorization.

1654450161389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6864938670.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 1654450161389 in words is "one trillion, six hundred fifty-four billion, four hundred fifty million, one hundred sixty-one thousand, three hundred eighty-nine".