19798788785 has 8 divisors (see below), whose sum is σ = 25008996480. Its totient is φ = 15005397744.

The previous prime is 19798788781. The next prime is 19798788803. The reversal of 19798788785 is 58788789791.

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

It is not a de Polignac number, because 19798788785 - 2² = 19798788781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19798788781) 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, 104204057 + ... + 104204246.

It is an arithmetic number, because the mean of its divisors is an integer number (3126124560).

Almost surely, 2^19798788785 is an apocalyptic number.

It is an amenable number.

19798788785 is a deficient number, since it is larger than the sum of its proper divisors (5210207695).

19798788785 is a wasteful number, since it uses less digits than its factorization.

19798788785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208408327.

The product of its digits is 568995840, while the sum is 77.

The spelling of 19798788785 in words is "nineteen billion, seven hundred ninety-eight million, seven hundred eighty-eight thousand, seven hundred eighty-five".