163997192378880 has 360 divisors, whose sum is σ = 660697940892132. Its totient is φ = 37485072285696.

The previous prime is 163997192378843. The next prime is 163997192378947. The reversal of 163997192378880 is 88873291799361.

163997192378880 is a `hidden beast` number, since 1 + 6 + 3 + 99 + 71 + 92 + 378 + 8 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 162241970155776 + 1755222223104 = 12737424^2 + 1324848^2 .

It is a tau number, because it is divible by the number of its divisors (360).

It is a Smith number, since the sum of its digits (81) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 163997192378880.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 71503017 + ... + 73760936.

Almost surely, 2^{163997192378880} is an apocalyptic number.

163997192378880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163997192378880 is an abundant number, since it is smaller than the sum of its proper divisors (496700748513252).

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

163997192378880 is a wasteful number, since it uses less digits than its factorization.

163997192378880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145263996 (or 145263970 counting only the distinct ones).

The product of its (nonzero) digits is 1975228416, while the sum is 81.

The spelling of 163997192378880 in words is "one hundred sixty-three trillion, nine hundred ninety-seven billion, one hundred ninety-two million, three hundred seventy-eight thousand, eight hundred eighty".