19788661345411 has 24 divisors (see below), whose sum is σ = 23659717511520. Its totient is φ = 16496191958400.

The previous prime is 19788661345381. The next prime is 19788661345459. The reversal of 19788661345411 is 11454316688791.

It is not a de Polignac number, because 19788661345411 - 2¹⁵ = 19788661312643 is a prime.

It is a super-2 number, since 2×19788661345411² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19788661145411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36927775 + ... + 37459816.

It is an arithmetic number, because the mean of its divisors is an integer number (985821562980).

Almost surely, 2^{19788661345411} is an apocalyptic number.

19788661345411 is a deficient number, since it is larger than the sum of its proper divisors (3871056166109).

19788661345411 is an equidigital number, since it uses as much as digits as its factorization.

19788661345411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74387755 (or 74387748 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 64.

The spelling of 19788661345411 in words is "nineteen trillion, seven hundred eighty-eight billion, six hundred sixty-one million, three hundred forty-five thousand, four hundred eleven".