19728077563 has 8 divisors (see below), whose sum is σ = 19873709856. Its totient is φ = 19582972800.

The previous prime is 19728077561. The next prime is 19728077581. The reversal of 19728077563 is 36577082791.

It is a happy number.

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 19728077563 - 2¹ = 19728077561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19728077561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56656 + ... + 206557.

It is an arithmetic number, because the mean of its divisors is an integer number (2484213732).

Almost surely, 2^19728077563 is an apocalyptic number.

19728077563 is a deficient number, since it is larger than the sum of its proper divisors (145632293).

19728077563 is a wasteful number, since it uses less digits than its factorization.

19728077563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263765.

The product of its (nonzero) digits is 4445280, while the sum is 55.

The spelling of 19728077563 in words is "nineteen billion, seven hundred twenty-eight million, seventy-seven thousand, five hundred sixty-three".