196776289309 has 4 divisors (see below), whose sum is σ = 196778171260. Its totient is φ = 196774407360.

The previous prime is 196776289301. The next prime is 196776289387. The reversal of 196776289309 is 903982677691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903982677691 = 102253 ⋅8840647.

It can be written as a sum of positive squares in 2 ways, for example, as 138325974084 + 58450315225 = 371922^2 + 241765^2 .

It is a cyclic number.

It is not a de Polignac number, because 196776289309 - 2³ = 196776289301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196776289301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774294 + ... + 996535.

It is an arithmetic number, because the mean of its divisors is an integer number (49194542815).

Almost surely, 2^196776289309 is an apocalyptic number.

It is an amenable number.

196776289309 is a deficient number, since it is larger than the sum of its proper divisors (1881951).

196776289309 is a wasteful number, since it uses less digits than its factorization.

196776289309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881950.

The product of its (nonzero) digits is 61725888, while the sum is 67.

The spelling of 196776289309 in words is "one hundred ninety-six billion, seven hundred seventy-six million, two hundred eighty-nine thousand, three hundred nine".