196404431605 has 8 divisors (see below), whose sum is σ = 235795412664. Its totient is φ = 157050148800.

The previous prime is 196404431581. The next prime is 196404431611. The reversal of 196404431605 is 506134404691.

It can be written as a sum of positive squares in 4 ways, for example, as 122207574724 + 74196856881 = 349582^2 + 272391^2 .

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

It is not a de Polignac number, because 196404431605 - 2¹⁹ = 196403907317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9162786 + ... + 9184195.

It is an arithmetic number, because the mean of its divisors is an integer number (29474426583).

Almost surely, 2^196404431605 is an apocalyptic number.

It is an amenable number.

196404431605 is a deficient number, since it is larger than the sum of its proper divisors (39390981059).

196404431605 is a wasteful number, since it uses less digits than its factorization.

196404431605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18349127.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 196404431605 in words is "one hundred ninety-six billion, four hundred four million, four hundred thirty-one thousand, six hundred five".