196540978719 has 8 divisors (see below), whose sum is σ = 262081145392. Its totient is φ = 131014065600.

The previous prime is 196540978657. The next prime is 196540978747. The reversal of 196540978719 is 917879045691.

196540978719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 196540978719 - 2⁷ = 196540978591 is a prime.

It is a super-2 number, since 2×196540978719² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196540978719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196540978759) 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, 3278734 + ... + 3338139.

It is an arithmetic number, because the mean of its divisors is an integer number (32760143174).

Almost surely, 2^196540978719 is an apocalyptic number.

196540978719 is a deficient number, since it is larger than the sum of its proper divisors (65540166673).

196540978719 is an equidigital number, since it uses as much as digits as its factorization.

196540978719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6626777.

The product of its (nonzero) digits is 34292160, while the sum is 66.

The spelling of 196540978719 in words is "one hundred ninety-six billion, five hundred forty million, nine hundred seventy-eight thousand, seven hundred nineteen".