163878449450 has 48 divisors (see below), whose sum is σ = 324722653920. Its totient is φ = 61353069120.

The previous prime is 163878449437. The next prime is 163878449453. The reversal of 163878449450 is 54944878361.

163878449450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×163878449450² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163878449450.

It is not an unprimeable number, because it can be changed into a prime (163878449453) 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 23 ways as a sum of consecutive naturals, for example, 960329 + ... + 1118028.

It is an arithmetic number, because the mean of its divisors is an integer number (6765055290).

Almost surely, 2^163878449450 is an apocalyptic number.

163878449450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163878449450 is a deficient number, since it is larger than the sum of its proper divisors (160844204470).

163878449450 is a wasteful number, since it uses less digits than its factorization.

163878449450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078471 (or 2078466 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 163878449450 in words is "one hundred sixty-three billion, eight hundred seventy-eight million, four hundred forty-nine thousand, four hundred fifty".