609168455545 has 32 divisors (see below), whose sum is σ = 788540794272. Its totient is φ = 449100951552.

The previous prime is 609168455531. The next prime is 609168455557. The reversal of 609168455545 is 545554861906.

609168455545 = 551891² + 551892².

It can be written as a sum of positive squares in 16 ways, for example, as 5518706944 + 603649748601 = 74288^2 + 776949^2 .

It is a 6-Lehmer number, since φ(609168455545) divides (609168455545-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 609168455545 - 2⁷ = 609168455417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 609168455545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122492679 + ... + 122497651.

It is an arithmetic number, because the mean of its divisors is an integer number (24641899821).

Almost surely, 2^609168455545 is an apocalyptic number.

609168455545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

609168455545 is the 551892-nd centered square number.

It is an amenable number.

609168455545 is a deficient number, since it is larger than the sum of its proper divisors (179372338727).

609168455545 is a wasteful number, since it uses less digits than its factorization.

609168455545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7741.

The product of its (nonzero) digits is 25920000, while the sum is 58.

The spelling of 609168455545 in words is "six hundred nine billion, one hundred sixty-eight million, four hundred fifty-five thousand, five hundred forty-five".