19680091645 has 8 divisors (see below), whose sum is σ = 23620826880. Its totient is φ = 15740928720.

The previous prime is 19680091609. The next prime is 19680091649. The reversal of 19680091645 is 54619008691.

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

It is not a de Polignac number, because 19680091645 - 2⁷ = 19680091517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19680091649) 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 7 ways as a sum of consecutive naturals, for example, 365361 + ... + 415750.

It is an arithmetic number, because the mean of its divisors is an integer number (2952603360).

Almost surely, 2^19680091645 is an apocalyptic number.

It is an amenable number.

19680091645 is a deficient number, since it is larger than the sum of its proper divisors (3940735235).

19680091645 is an equidigital number, since it uses as much as digits as its factorization.

19680091645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786155.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 19680091645 in words is "nineteen billion, six hundred eighty million, ninety-one thousand, six hundred forty-five".