196406389081 has 8 divisors (see below), whose sum is σ = 227814660800. Its totient is φ = 165835671408.

The previous prime is 196406389079. The next prime is 196406389099. The reversal of 196406389081 is 180983604691.

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 196406389081 - 2¹ = 196406389079 is a prime.

It is a super-2 number, since 2×196406389081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196406389031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209388006 + ... + 209388943.

It is an arithmetic number, because the mean of its divisors is an integer number (28476832600).

Almost surely, 2^196406389081 is an apocalyptic number.

It is an amenable number.

196406389081 is a deficient number, since it is larger than the sum of its proper divisors (31408271719).

196406389081 is an equidigital number, since it uses as much as digits as its factorization.

196406389081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418777023.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 196406389081 in words is "one hundred ninety-six billion, four hundred six million, three hundred eighty-nine thousand, eighty-one".