163229552978 has 18 divisors (see below), whose sum is σ = 255973186917. Its totient is φ = 78060022920.

The previous prime is 163229552977. The next prime is 163229552989. The reversal of 163229552978 is 879255922361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 110318972449 + 52910580529 = 332143^2 + 230023^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=285683.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163229552977) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13135208 + ... + 13147628.

Almost surely, 2^163229552978 is an apocalyptic number.

163229552978 is a deficient number, since it is larger than the sum of its proper divisors (92743633939).

163229552978 is an frugal number, since it uses more digits than its factorization.

163229552978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24890 (or 12446 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 59.

The spelling of 163229552978 in words is "one hundred sixty-three billion, two hundred twenty-nine million, five hundred fifty-two thousand, nine hundred seventy-eight".