663273578863044 has 36 divisors (see below), whose sum is σ = 1676619792354780. Its totient is φ = 221089666037760.

The previous prime is 663273578863043. The next prime is 663273578863057. The reversal of 663273578863044 is 440368875372366.

663273578863044 is a `hidden beast` number, since 6 + 6 + 3 + 2 + 7 + 3 + 578 + 8 + 6 + 3 + 0 + 44 = 666.

663273578863044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 470945553638400 + 192328025224644 = 21701280^2 + 13868238^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (663273578863043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58330449 + ... + 68767640.

It is an arithmetic number, because the mean of its divisors is an integer number (46572772009855).

Almost surely, 2^{663273578863044} is an apocalyptic number.

It is an amenable number.

663273578863044 is an abundant number, since it is smaller than the sum of its proper divisors (1013346213491736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663273578863044 is a wasteful number, since it uses less digits than its factorization.

663273578863044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127243060 (or 127243055 counting only the distinct ones).

The product of its (nonzero) digits is 2926264320, while the sum is 72.

The spelling of 663273578863044 in words is "six hundred sixty-three trillion, two hundred seventy-three billion, five hundred seventy-eight million, eight hundred sixty-three thousand, forty-four".