194478667072 has 28 divisors (see below), whose sum is σ = 385964253216. Its totient is φ = 97227831680.

The previous prime is 194478667069. The next prime is 194478667073. The reversal of 194478667072 is 270766874491.

194478667072 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 2×194478667072² (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 194478667072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194478667073) 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 3 ways as a sum of consecutive naturals, for example, 379047 + ... + 729817.

Almost surely, 2^194478667072 is an apocalyptic number.

It is an amenable number.

194478667072 is a deficient number, since it is larger than the sum of its proper divisors (191485586144).

194478667072 is an equidigital number, since it uses as much as digits as its factorization.

194478667072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359446 (or 359436 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 61.

The spelling of 194478667072 in words is "one hundred ninety-four billion, four hundred seventy-eight million, six hundred sixty-seven thousand, seventy-two".