19678055563 has 8 divisors (see below), whose sum is σ = 19814418000. Its totient is φ = 19541750688.

The previous prime is 19678055561. The next prime is 19678055627. The reversal of 19678055563 is 36555087691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19678055563 - 2¹ = 19678055561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19678055561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849645 + ... + 872497.

It is an arithmetic number, because the mean of its divisors is an integer number (2476802250).

Almost surely, 2^19678055563 is an apocalyptic number.

19678055563 is a deficient number, since it is larger than the sum of its proper divisors (136362437).

19678055563 is a wasteful number, since it uses less digits than its factorization.

19678055563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28781.

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 19678055563 in words is "nineteen billion, six hundred seventy-eight million, fifty-five thousand, five hundred sixty-three".